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Патент USA US2019518

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Nov. 5, 1-935.
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_
M. E. WIDELL
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2,019518
STRIP STOCK FEEDING AND GAUG'ING
' Filed March 27,’ 1954
8 Sheets-Sheet
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INVENTOR
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ATTORNE 5
Nov. 5, 1935.
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2,019,518
STRIP STOCK FEEDING AND GAUGING
Filed March 27, 1954
a Sheets-Sheét 2.
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INVENTOR
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ATTORNEYS
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Nov.'-5, 1935.
M. E. WIIVDELL
2,019,518
STRIP STOCK FEEDING AND GAUGING
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Filed March 2'7, 1934'
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2,019,518
M. E. WID‘ELL
STRIP STOCK FEEDING AND GAUGING
Filed March 27, 1934
8 Sheets-Sheet 4
INVENTOR
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Nov. 5, 1935.
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M; E, WIDELL
2,019,518
STRIP STOCK FEEDING AND GAUGING
Filed March 27, 1934
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ATTORNEY
Nov. 5, 1935.
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M. E._WIDELL
2,019,518
STRIP STOCK FEEDING AND GAUGING
Filed March 27, 1934-
8 Sheets-Sheet '7:
Nov. 5, 1935.
M. E. WIDELL
2,019,518
STRIP STOCK FEEDING AND GAUGING
,
Filed March 27, 1954
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8 Sheets-Sheet 8
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INVENTOR
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BY 251%?
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Patented Nov. 5, 1935
5 2,019,518
PATENT oFFics
UNITED .- ‘STATES
2,019,518
STRIP STOCK FEEDING AND GAUGING
Magnus E. Widell, Cincinnati, Ohio. minor to
American Can Company, New York, N. Y., a
corporation of New Jersey
Application March 27, 1934, Serial No. 117,014
~
9 Claims.
(01. 164-89)
The present invention relates to an apparatus
_ for feeding and blanking strip stock or the like
and has particular reference to the control of
'
on‘ anfenlarged scale taken substantially along
the lines 9-‘9 and Ill-l0 in Fig. 8;
Fig. 11 is an enlarged sectional detail of the
the stock so that it is at all times in proper posi
press notching device taken substantially along
tion for the blanking operation.
An object of the present invention is the pro
vision of strip handling devices for a blanking
press _or,..the like which evenly withdraw strip
~ Figs. 12 and 13 are; enlarged sectional details
material from a reel, which feed the'strip to the
press in accordance with its blanking~require-_
ments and which maintain an amount of strip
material within limits between the reel and the
press so that unevenness of feeding is avoided
and high speed operation is effected.
.
Another object of the invention is the provi
bodiment of the present invention, the several
units shown are'indicated generally as a. spool
or reel strip support A, a withdrawing unit B, a
the line II-ll invFig. 10;'and
‘
‘
of the press gauging device taken substantially
along the line I 2-l2 in Fig. 10 and showing dif
ferent steps in the gauging operation.
} In the drawings which disclose a preferred em- 10
.press feeding‘ unit C, a strip gauging unit D and
a press E.
.
.
,
-
15
sion of variable speed withdrawing devices for
strip stock which are regulated in accordance
The reel support A is adapted to hold a spool
of strip stock in asuitable position for easy with
with the requirements of a press or othervma
drawal of the strip by the unit B which is con- .
chines using this stock.
00
A further object of the invention is the pro
vision of gauging elements operated in connec
tion with ‘strip handling devices for a press by
tinuously operated but at varying speed in ac
cordance with the‘ amount of strip stock required 20
in the press. The feeding unit C is preferably in
termittent in its action and feeds the work, i.‘e.,
means of which the strip stock is accurately lo
the strip material, to-the press E between the
dated for ‘a press operation after the proper blanking or other working parts of the press.
amount of strip stock is presented.
The gauging unit D acts upon the strip stock just 25,
' Yet another object of the invention is the . before the working portion of each press ‘stroke
provision of trensioning elements in strip han
and accurately positions the stock each time for
dling devices for a press which insure an even
movement of the strip from its supply reel to the
press thereby avoiding sudden ?uctuations and
unnecessary strains, buckling or kinking of- the
strip while in the apparatus.
Numerous other objects ‘and advantages of the
invention will be apparent as it is better under
stood from the following description, which, taken
in connection with the accompanying drawings,
discloses a preferred embodiment thereof.
Referring to the drawings:
'
.
Figure 1 is a perspective view of ,a press pro
vided with strip feed and control units embody;
ing the present invention;
Fig. 2 is an enlarged sectional view of the strip
stock reel and its support;
‘
Fig. 3 is an enlarged side elevation of’the stock
withdrawing devices and speed control as viewed
from the discharge side, parts being broken away
to more clearly show the construction;
Fig. 5 is an elevation of the same as viewed
from a position indicated by the line 5-5 in
Fig. 3; '1
Fig. 6 is an enlarged end elevation of the press
as seen from the feed-in side;
'
Fig. 7 is an enlarged sectional detail taken
substantially along the line ‘l——'| in Fig. 6;
Fig. 8 is a top and front view of .the press
showing intermittent feed units and gauging de
vices for the strip stock;
6
'
v .
I
The strip stock, designated by the letter S,
passes through both of the units B and C. A loop 30
L is maintained in the stock between the two
units to allow for any variation in the intermit
tent demand of the unit 0 or the continuous with
drawing action of the unit B. This loop L also
allows for the unit B toregulate and control the 35
speed of withdrawal from the spool on the sup
port A in a manner to be described later.
"The reel support unit A (see Figs. 1 and 2) be-‘
‘sides holding or supporting .a spool or reel 2| of
strip stock S for withdrawal by the unit B also 40
contains means for preventing an unrestrained
rotation of the reel as the stock is unwound there
from thus maintaining the proper tension on the
stock. This unit comprises a drum 22 formed
with an extended ?ange 21 on which the spool 45
' of stock rests when it is placed over the drum.
The drum 22 rotates on an‘axis inclined from >
Fig. 4 is a top plan view'of the mechanism
shown in Fig. 3;
it)
the blanking or other operation.
- ~
Figs. 9 and 10 are sectional views of the press >
the vertical such inclination being substantially
that of the work feed table of the press which
may be inclined in the usual manner to permit 50
discharge of the work after blanking. , The drum
22- is secured to a disc 28 which‘ is formed with a
centering boss 29 on Which the flange 21 is cen
tered.,
..
"
The disc 28 is secured to the upper end of an 55
inclined shaft 32 which is journaled in a bearing -
34 the shaft being formed. with ‘an enlarged shoul
der 35 which‘ rests on the bearing. ‘Bearing 34
is a part of a supporting base 36 which may rest 60
on the ?oor or otherwise as desired.‘
v
‘
‘
‘
2
v
2,019,518
.
'
.
*
The braking mechanism for preventing unre
portions on which nuts 84 and washers 85 are
strained rotation of the drum 22 andthe reel or mounted. This construction provides pressure _
spool 2| carried thereby consists of a lever 4| adjusting
for the springs 8| which are
(Fig. 2) pivotally mounted at its center on a pin held between the washers 85 and the'arms of the
42 carried in the base 36. The lever 4| carries cage 63.
'
a brake shoe 43 at its upper end which bears on
A manual separation of the driving and pres
the inner surface of a depending cylindrical sure rollers is provided and this feature is used
?ange 44 of the disc 28. A stud 46 ?xed in the for adjustments or exchanges of the stock or
base 36 passes loosely through a hole in the lower mechanism. Such manual separation is made
end of the lever, where a spring 41 is mounted. without disturbing the pressure adjustment of 10
This spring is located on the stud and is adjust- ' the springs 8|. An arm 9| (Figs. 4 and 5) ex
ably held against the lever by a nut 48 and washer tends radially i’rom the middle of the cage hub
49. The spring 4'! tends to move the lever 4| 66 and terminates in a boss 92 on which one end
counterclockwise (as viewed in-Fig. 2) and this of a link 93 is pivotally mounted. The other end
15 forces the brake shoe 43 against the ?ange 44 at of the link is pivotally and eccentrically connected
a desired braking pressure, thereby restraining to a head 94 of a rock shaft 95. ,
‘
any free or uncontrolled rotation of the reel 2|.
_ The rock shaft 95 is journaled in bearings, 96
The withdrawing unit B (see Figs. 1, 3, 4 and formed in the bracket 62 and carries a handle 91
5) comprises a pair of inclined rotating rollers. secured to it adjacent the upper bearing 96.
These co-act upon the strip S, which passes be
Manual actuation of the handle through about
tween them,.as indicated in Fig. 4, to progres
180°. from'the position as shown in Fig. 4 causes
sively pull the strip from its spool. One roller movement of the rock shaft head 94. By virtue
which may be termed the driving roller rotates _of its eccentric connection to the head, the link
on a ?xed axis. It is driven by a motor, the speed 93 is drawn back and this draws with it the arm
25 of which is governed by a regulating device that ‘ 9| which in turn moves the cage 63 through a _
controls the motor speed in accordance with the
amount of excess stock in the loop L.
The other roller may be termed a pressure '
roller. It is supported in a spring pressed cage
30 that provides a yielding pressure on that part of
the strip S that is between the rollers. Provision
is also made to relieve this pressure on the stock
small arc su?icient to separate the pressure roller
6| from the stock S and from the driving roller 58.
Driving means for the withdrawing unit is
preferably provided by a variable speed motor
IOI (Fig. 3) which drives the withdrawing rollers "
58, 6| through suitable gearing (see also Fig. 4).
The motor vI0I is bolted to the base 5| and
by manual separation of the driving and pres
carries a sprocket I02 keyed to its shaft I03. A
sure rollers. This leaves the stock free between chain I04 operates over. the sprocket I02 and
the rollers.
over a sprocket I05 which is keyed to a worm
The unit B is carried on"a base 5| at an in
shaft I06. Rotary motion from the motor is thus
clination substantially the same as that of unit
A. This base may be mounted on a sub-base 52
which also supports the press E. A bearing
40 bracket 53 is securely bolted to the base 5| and
carries a substantial portion of the moving parts
of the unit.
The bracket 53 is provided with an upper hear
ing 55 (Fig. 3) and a lower bearing 56 in which
45 an inclined drive shaft 51 is journaled. The driv
ing roller (designated by the numeral 58) is se
cured to the shaft 51 between the bearings 55, 56.v
It is formed with a ?ange 59 at its lower end
which prevents the stock S from creeping oi‘ the
50 roller due to the inclination of the unit. The
shaft and roller are driven in a manner which
55
will presently be described.
The pressure roller (designated by the numeral
6|) which co-acts with the driving roller 58 is
mounted in the following manner. A bearing
bracket 62 (Figs. 4 and 5) is bolted to the base 5|
and carries a cage 63 which is pivotally connected
to the bracket by a shaft 64. Shaft 64 is carried
in bracket bearings 65. A cage hub 66 is mount
.60 ed on the shaft 64 and is slotted at both top and
bottom to accommodate the bearings 65.
An upper cage arm ‘II and a lower cage arm
‘I2 extend radially from the hub 66 and provide
a mounting for the roller. One arm is provided
65 with an upper bearing 13, the other with a lower
bearing ‘I4. A roller shaft ‘I5 passes through
transmitted to a worm I01 secured to the shaft
I06. The worm engages a worm wheel I08 ?xed
on the drive roller shaft 51 and thereby rotates
the driving roller 58.
7
40
When the rollers 58, 6| withdraw the stock S
from the unit A, they rotate in opposite direc—
tions, and at equal surface speeds. To obtain
this result, a gear III, secured, to thelfishaft 51
adjacent the bearing 66, meshes with ai'gear II2
secured to the shaft ‘I5.
.
The speed of the motor IOI which governs the
speed of stock withdrawal is under the control of
a loop L of the stock between the units B and C.
This loop indicates by its depth, normal shape '
or shallowness that the demand of the blanking
press is less than, equal to or in excess of the
speed of withdrawal. A device for detecting slight
variations in the loop shape or depth is used and
this device will now be described in detail. It in
turn operates a motor speed ‘control and thus
functions in accordance with the demands of the
blanking press.
Control contact with the loop L is made by a
pair of detector rods II5 (Fig. 3) between which 60
the stock S passes and which are shifted in
'
position by a change in shape of the loop. Their
movement is transferred to a rheostat II6 which
controls the motor speed and which is thus a
part of the control device. A control bracket III 65
is bolted to the extremities of the cage arms 1 I, ‘I2
these'be'arings and carries the pressure roller 6| ' and provides a support for the detector rods I I5.
which is secured to it between the cage bearings. ‘A pair of detector arms III! are pinned to the -
Spring pressure for holding the rollers in with
70 drawing engagement with ‘the strip is applied to
the cage 63 by springs 8| (Figs. 3 and 4) located
adjacent the ends of the pressure roller which
are mounted on rods 82 ?xed in the stationary
bracket 53. These rods pass through holes 83
in the cage arms 'I I, ‘I2 and terminate in threaded
ends-of a rock shaft I I9 which is joumaled in
bearings I 2| of the bracket III.
70
A spacer bar I22'interposed between the free
ends of the detector arms II 8 holds them in
spaced alignment. The extremities of the de~
tector arms are formed as bosses I23 in which
disc bearing blocks I24 are pivotally mounted.
2,019,518
3
The detects. rods I I8 are loosely mounted in these
blocks and the latter act in some degreeras side
as viewed in Fig. 8. This pair of ‘rollers feeds
guides for the stock S as it passes between the
The second or discharge section includes in‘
clined parallel rollers I81, I88 (Fig. '8) and is
rods.
the strip-stock S to the press. ' '
'
The rheostat us (Figs. 3 and 4)’ is secured‘ located on the right side as viewed in that ?gure.
Rollers I81, I88 discharge the scrap strip stock
to a rheostat support I25. which is bolted to the
control bracket II1. A'rheostat shaft I28 is
Journaled in a bearing I21 formed in the sup
from the press after the press-formed'or blanked‘
articles have been removed. The rollers I88,
port I25 and a gear t8I secured to the shaft
I88 and the first section of the feed-in unit C‘
10 adjacent the bearing meshes with a larger gear
will now be described.‘
I32 pinned to the rock shaft II8. Swinging of
the arms H8 due to change of shape of the
stock loop L acting against the detector rods
H5, is transmitted to the rheostat shaft I28
‘
'
-
The roller I85 (Fig. 6) is mounted on'and
secured to an inclined shaft I88 which is jour
naled in three spaced bearing blocks or brackets
288, 28I, 282 mounted on a feed-in bracket 283
(see also Fig. 8) which is bolted on one side of 15
15 through'the gears I82, I8I.
.
' ' Movement of the rheostat shaft I28 changes
the frame table I88. The roller I88 (Figs. 6, 8
the setting of the rheostat H8 in the usual
manner. The rheostat governs the speed of the
and 10) is a pressure roller and is mounted on
and ‘secured toan inclined shaft 284 which is
motor I8I which rotates the withdrawing rollers ' Journaled in bearings 285 formed in a hinged
20 58-, 8|. In this manner the rheostat II8 coop
cage 288.
.
'
.
20
erates with the detector rods H8 and the loop . Cage 288 is pivotally associated with the two
L to govern the speed of withdrawal of the bearing blocks _28I, 282 by a supporting rock
-' stock S.
shaft 281. A cage hub 288 is mounted on the
The press feeding unit C and the notching shaft and is slotted at both top and bottom to ,
25 and gauging unit D are mounted on the press E " accommodate the bearing blocks, this construc 25
(Fig. 8). They are directly actuated by moving tion being similar to the pressure roller 8| and
its cage mounting.
.
elements of the press and so act in synchro
nism with its movements.
-
Pressure for the feeding engagement of the I
-
The press Eas exempli?ed ‘in Figs. 1, 6 and 8
30 maybe and is herein shown as a triple blanking
rollers I85, I88_with the strip stock 8 is applied
to the hinged-cage 288 and through it to the 30
inclined press. A main arch frame I88 of the
press may be mounted upon rear support col
umns I8I and front base members I82 carried
by the sub-base 52. The main frame I88 com
35 prises a frame table I88 extending up into two
pressure roller I88. This is a yielding pressure
mounted on rods 2I8 extending out from and
uprights or legs I84, I85. Spaced angle irons
I88 (Figs. 1, 6 and 10) act as guide rails for
of the cage 288. Springs 288 are adjustably
held under proper compression by washers 2H
effected’ by springs 288 (Fig. 6) which are
carried by the bearing blocks 28I, 282. These
rods pass loosely through openings in the arms 35
the strip stock 8 as it passes into the press these
rails being supported indirectly on the press
48 frame and extending laterally from the press
leg I84.
-
and nuts M2 the latter being threadedly en- ‘
gaged on the free ends of. the rods.
Separation of the rollers after a strip has‘
‘been positioned in the press is made 'at the
.
time the press slide I82 moves down to perform
the blanking or other operation and is brought
about by rocking of the cage 288 and by lifting
of thepressure roller I88 against the yielding
Three lower die members I81 (see Figs. 8 and
10) are bolted to an inclined bolster plate I88
which is secured to the frame table I88 and
45 three cooperating punches or upper die mem
action of the springs 288. It is done in the
bers I88 are secured to an inclined punch plate
I 8|. The punch plate is in turn secured to
a press slide I82. which is slidably mounted in
the arch frame legs I84, I85. _ These ' cooperat-
ing die members provide the active elements for
the’ blanking or other press operations.
The slide I82 is actuated in the usual man'
following
,,
manner:
'
'
.
The hub 288 (F‘gs. 6 and 10) of the cage 288
is extended'laterally info an arm 2I3 the free
end ofwhich carries'a stud 2I4 on which a roller
2I5 (see also Fig- 8) is rotatably mounted. A
cam block 2I8 is carried on a horizontal bar 2"
ner as by means of a pitman connecting with ,a
crank element formed on a press crankshaft I83
secured to the press slide I82 and when the lat
as best illustrated in Fig. 8. This crankshaft is
mounted in bearings formed in the arch frame
I88 and receives its motion from a belt driven
pulley and ?ywheel I84 secured on theshaft.
2I5 and pushes it out, at the same time rocking
The strip feeding unit 0 comprises two pairs
60 of intermittently driven rollers which engage
the stock or strip S under pressure and feed it
across the lower dies I81 between the strokes of
thepress. ‘Such strip feeding is stopped after
ter moves down this cam block engages the roller
the cage 288 on its shaft mounting 281. ‘ This
moves the pressure roller I88 away from the feed
in roller I85 thus releasing the interposed strip
stock S so that gauging (as by the gauging unit
D)- will take place before the punches I88 reach
the strip.
The rollers I85, I88 are rotated in unison and
for this purpose are interconnected by gearing,
each advance of the strip and a braking action .which remains in driving connection even when
65 comes into play to prevent overfeed of the roll-\ the pressure roller I88 is moved away from the
feed-in roller as just‘ described. Such a gearing
ers. The pressure of the rollers on the stock
comprises a drive gear 22I (Fig. 6)_ secured to the
is then relieved leaving the stock free to be
shaft I88 which’ meshes with a driven gear 222
acted on by the gauging unit D as will be de
secured to the shaft 284.
~
70 scribed later.
Rotation of the rollers ‘I85, I88 is intermittent
Each'pair of feeding rollers may be said to
constitute elements of‘ one of two sections of
the strip feeding unit C. A ?rst or feed-in
section includes inclined parallel rollers I85, I88
75. (Fig. 6) and this section is located on the left
70
and is brought about through theuse of a pawl
and ratchet unit actuated continuously from the
crank shaft I83 as best shown in Figs. 6 and 8.
The crank shaft I88 carries a spiral gear 225
which meshes with ‘a spiral gear 228 secured to 75
9,019,518
an inclined shaft 221 which is at right angles to
This shifting of the pivot pin '2“ is brought
the or nk shaft.
- about by movement of an arm 25I. secured to the
Shaf 221 is journaled In bearings 228, 229 'pin intermediate its head and the bearing 245.
formed ina bracket 239 bolted on-the outside and The outer end ofthis/arm is ‘connected by a con
adjacent to the top of the arch frame leg I84. A necting rod 252 to the end of an arm 253 which 5
crank disc 23I is secured to one end of the shaft
221 and carries a headed stud 232 on which the
upper end of a connecting rod 233 is loosely
is pivotally mounted on a pin 254 carried in a
bracket 255 bolted to the face of the frame
leg I84.
mounted. The opposite end of the rod 233 loosely
10 engages a pin 234 projecting out from one face
of a pawl and ratchet housing 235.
The housing 235 is loosely mounted on the feed
in roller shaft I 99 outside of the bearing 299.
This'housing encloses a ratchet wheel 236 (Fig.
15 7) which is keyed to the shaft and the housing
carries a spring pressed dog or pawl 231 which is
operates within av groove 251 of a. face cam 253 .
and this cam is secured to the end of the shaft
221. ‘The cam groove is of such a shape as’ to
cause raising and lowering of the arm 253 and
through the described connections with the other 15
arm 25I, the pivot pin 244 is oscillated to further
spread the brake shoes. this being against the
action of the spring 249. ’In point of time the
mounted in a slide seat formed in a periphery
of the housing. A spring 238 is usedto back up
the pawl and this keeps its inner bevel face against
v20 the teeth of the‘ratchet wheel.
‘
As the housing 235 is oscillated back and forth
relative to the center of the shaft I99, ,the latter
braking device is out of operation when the rollers
' are rotating and when they ‘are advancing the 29
is advanced in one direction with one part of the
oscillation.
On the return the pawl 231 slides
25 past the teeth of the ratchet wheel 236 thus ad
‘ vancing the shaft in a step by step movement.
Movement of the shaft takes place as the con
necting rod 233 moves up andwith the rollers
I95, I96 engaged and feeding the strip S.
Provision is made for abruptly stopping the ro
tation of the rollers, I95, I96 and the feeding ac
tion on the strip stock therebetween so that there
will not be an overthrow or uncontrolled move
ment. This is brought aboutby a braking device
35 that is cam actuated from the shaft 221 and that
operates directly on the feed-in roller. shaft I99.
This braking device comprises a brake drum
'40
239 (Figs. 6 and 8) which is secured to the end
of the shaft I99 opposite the pawl and ratchet
housing 235 and is adjacent and outside of the
bearing 292. Brake-shoes 249, 24I are pivotally
connected together beneath the drum 239 and are
held in av pair of parallel links 242 which have
their ends connected to the bracket 293.
The free ends of the brake shoes are located on
45
opposite sides of a rectangular end or head 243
of a pivot pin. 244 (see also Fig. 10) which is
mounted for oscillation in a bearing 245 formed
‘in a bracket 246 bolted to the face of the arch
50 frame leg I84. These free ends are tied together
by a bolt 241 which extends loosely through an
opening formed in one of the shoe ends this being
in the shoe 2“ and is threaded in the shoe 249.
This bolt is also loose in the rectangular head 243
55 of the pin 244 and passes through the head.
A .
lock nut 248 is threadedly secured to the end of
. the bolt.
A spring 249 is interposed between the end of
the shoe 24I and the head of the bolt and keeps
60 the ends of the brake shoes in engagement with
the opposite faces of the rectangular head 243
of the pin. When these engaged faces of' the
head are straight with the faces of the ends of
the brake shoes, as illustrated in Fig. 10, the .
65 spring 249 holds the shoes clamped on the brake
drum 239 this being their braking position.
The pivot pin 244 may be rocked in its bearing
245. When this takes place and when the en
gaged sides of the head of the pin are at an angle
70 to the faces of the ends of the brake shoes, the
latter are separated further so that the clamping
engagement between the shoes and the brake
drum is nulli?ed. This is the unbraking or free
position and the brake drum 239 and the shaft
75 I99 are then free to rotate.
-
The arm 253 is located adjacent the end of the
shaft 221 and carries a cam roller 256 which l0v
strip 8. The braking action on the other hand
takes place immediately following such an ad
vance movement of the strip stock by the rollers.
‘Before describing'the second section of the
strip feed-in unit C and the operation of the dis- 85
charge rollers‘ I91, I98 attention will be directed
to the gauging device D and to the blanking or
other die operations of the press.
The notching and gauging‘ unit D may be
divided into punch elements and die elements. 39
The punch elements are mounted on and move
up and down with the punch plate I9I. The die 7
elements are stationary and are mounted on the
die or bolster plate I88. The punch elements
comprise a notching punch 25I (Figs. 8 and 11) 35
and a gauging. and locating ?nger 252 (see also
Figs. 12 and 13) pivotally mounted on a block 263
which is secured to the punch plate I 9|. Both
notching punch and gauging ?nger are of similar
cross section for a purpose that will be made 40
evident as the description proceeds.
The die elements comprise 'a notching die 265
and a gauging die 266 (Figs. 8 and 10) and both
dies are mounted in a die block 268 which is
screwed to the bolster plate I88.
45
The strip S when released for gauging, as has
already been described, is in an approximately
correct blanking position relative to the press
dies, the guide bars vI8Ii on the side of the press
preventing any wide misplacement of the strip. 50
In addition to this, one-edge of the strip in'its
travel over the presstable I83 is guided in "a
groove 269 (Figs. 19 and 11) formed in one edge
of a guide bar 219.
‘
The guide bar 219 is mounted on a pair of 55
spaced blocks 21I which are bolted to the bolster
plate I88.‘ Accurate positioning of the bar 219
relative to the blocks 21I is made by two set
screws 212 one of which is threadedly engaged in
an upstanding lug of its associated block 21I and 60
its inner end abuts the rear wall of the guide bar.
A loclmut 213 threadedly secured on the setscrew
holds it in its adjusted position.
'
When the ends of the bar 219 have been prop
erly positioned by the setscrews 212 the bar is 65
locked in ?xed position on the blocks 21I by bolts
214. There are two of these bolts, one for each
block 21I and each bolt extends through a slot
215, formed in the block, and threadedly engages
into the guide bar from below. When tightened 70
these bolts hold the associated ends of the bar in
?xed position.
‘When the press slide is lowered this being.
immediately after the feed rollers I95, I96 of the
feeding unit C have been separated to free the 75
2,018,818
strip, an initial shifting of the strip 8 into notch-4
ing position takes place. The notching'punch
.5‘
engaging the forward edge' of the strip 8 passes
into the notch 280 of the strip andas a ?nger‘
26I is formed, with a lower projecting end 211 _ comes into vertical position and moves down into
which passes into an opening formed in ,a stripper the die 266 the ?nger notonly gauges‘the strip
plate 218 secured on the upper surface of the ' laterally but also longitudinally. The cross sec- 5
notching die 266. This projection ‘211 passes in tion of the ?nger 262.,being the same in shape as
front of the edge of- the strip S and con?nes this the notch '280 the inclined tapered walls of the
strip between it and the guide bar 210, this initial ?nger ?t closely within those 'ofvthe taperedv
' ‘ locating and con?ning position being illustrated
notch. Figure 13 illustrates the‘ lowermost posi
10 in Fig. 11.
.
3
Continued downward movement of the notch
. ing punch 26l thereupon brings the punch into
tion of the gauging ?nger 262 and shows ‘the in
strip S fully held in its gauged position.
v
.
The lower end of the ?nger 262 (Fig. 8) 'is
engagement with the strip. and the punch’then ‘slightly below the lower end of the notching
passes through the strip as it cooperates with
1B the notching die 265.‘ This action cuts out a
punch 26I and both of these members extend ~be-‘ ,
low the lower face of the blank punches I89. 18
fragment of the strip and constitutes the notch~ Therefore the effect of a single downward stroke
ing operation. The shape of the notch may bevv ,of the press slide I92 brings about ‘the three
any desired form, a tapered or V-shape notch 280
steps of operation on the stock S in the follow
(Fig. 10) being disclosed inthe drawings. The ing sequence: ?rst, a gauging of the strip stock.
inclined sides of such a notch assists in the
gauging action now to be described.
'
~
The distance between the center of the notch
ing die 265 and the center of the gauging die 266
is equal to the distance of the step advance of the
25 strip S as effected by the feeding device C. Ac
cordingly a notch 280 out in the edge of the strip
S at the die 265 at .one stroke of the press is
brought into approximate position over the
then a notching of the same and ?nally the 20
‘ blanking, forming or other operation of the
punches I89 and dies I81.
After the blanking operation the principal part.
of the strip S has been removed and there is
then left only a skeleton strip designated by the ‘25.
letter K (Fig. 10): This skeleton K passes into
and is discharged by the discharge‘ rollers I91,
I98 of the second section, of thestrip feeding
vgauging die 266 for the next stroke of the press. ' unit C. Attention will now be given to this op~
80 The gauging ?nger 262 at the latter position .eration of the discharge rollers.
30
therefore passes into the newly cut notch 280 and '
'The roller I91 is mounted on an inclined drive
properly centers the strip S relative to the blank
shaft 300 (Figs. 8 and 9) which is journaled in '
ing die, this action‘ at the same time centering
the strip for the next notching operation;
86
It will be understood that when a strip S is ?rst
introduced into the press the notch is cut in the
strip before its forward end has reached the
gauging device.
Such a ?rst cut therefore is a
preparation for the actual notching, gauging and
blanking of the strip which follows with the
second and succeeding strokes of. the press.
The gauging ?nger 262 (Figs. 8, 12 and‘ i3)
is pivotally mounted on a horizontal pin 285 car
45
ried in the block 263. This finger is directly
above the gauging die 266 and in the upper po
sition of the slide I92 is held in a tilted position
as shown in Fig. 12. This position'is brought
about by the action of a spring 286 which is
mounted at one end on a pin 281 carried in the
50 gauging ?nger and at the opposite end on a
bearings 301 carried in brackets 302 mounted ‘on
and secured to'a discharge bracket 303. Bracket
303 is bolted on the side of the frame table I83 85
and thus supports all of the second section of the
feeding unit'C.
.
- The 'roller I98 is a pressure ‘roller and- is
mounted on and secured to‘ an inclined shaft 304
which is journaled in bearings 305 formed in a a0 _
hinged cage 306. The rollers I91, I98 of the dis~
charge unit and their mountings as well ‘as man
ner of operation are substantially the same as
that of the feeding rollers I95, I96.
~The cage 306 is pivotally associated with two 45
bearings 301 formed by upward spaced projec- _
tions formed in the brackets 302, this‘association
being made by a supporting rock shaft 308. A
cage hub 309 is mounted on the shaft and is
slotted at both top and bottom to accommodate 50
the bearings 301.
Pressure for the feeding engagement of the
rollers I91, I98 against the strip stock S is‘ ap
plied to the hinged cage 306 and through it to
the pressure roller I98. This is a yielding pres
sure effected‘by springs 3“ (Fig. 8) which are
enters thegauging die 266. An inclined wall 292v mounted on rods 3I2 (see also Fig. 9) extending‘
is formed on the lower end of the ?nger and this . out from and carried by the brackets 302. These
gauges against a similar inclined face 293 out rods pass loosely through openings in the arm
60 in the wall of the opening of ' the notching die
of the-cage 306. The springs 3“ are adjustably 60
266. When the surfaces 292, 293 ?rst engage the held under proper compression by washers 3I3
inner side of the gauging ?nger 262 is in front of and nuts 3 I4, the latter being threadedly engaged '
post 288 extending down from the block‘ 263'.
The upper face of the gauging ?nger is inclined
at 289 and when tilted under the action of the
spring 286 this inclined face engages against an
55 inclined stop wall 29I formed in the block-263.
As the press slide moves down the ?nger 262'
the edge of the strip S.
- .
Continued downward movement of the press
05 slide with the gauging ?ngercarries the latter
further into the opening of the die 266- and.
slides the wall 292 over the inclined face 293 of
the die. This action shifts the ?nger from its
tilted position and brings it into‘ a'vertical posi;
tion as the spring 286 yields. This shifting of the
?nger forces the strip S toward the right (Figs.
12 and 13) so that its opposite edge is fully
seated against the wall of the groove 269 of the
guide bar 210.
'_
It will be understood that this ?nger 262 upon
76
on the free ends of the rods.
-
The rollers I91, I98 like the rollers I95, I96
are periodically separated so‘ that the skeleton 65
end K of the strip S is released each time the
press slide begins its downward movement. Like
the construction and operation ~of the ?rst sec
tion of the feeding unit this separation is brought
about by a rocking of the cage 306 and by a 70
lifting of the pressure roller I 98 against the
yielding action of the springs 3i I. It is done in
the following manner.
The hub ace of the case at is extended lat
erally into an arm 3| 5, the free end of. which 76
, e
2,010,510
carries a stud 3I5 on which a roller 3" is ro
tatably mounted. A cam block 3l3 is carriedv on
feeding said withdrawn stock from said unit and
into said press. means associated with'said with
a horizontal bar 3I_9 secured .to the press slide , drawing unit for maintaining an excess of stock
I92 directly opposite the bar‘ 2'I'I.' When the in loop form between said withdrawing unit and
press‘ slide I92 moves down this cam block en
I98 away from the roller I95 and releases the
said press, and means operated by a change in 5
shape of said loop for regulating the speed of with- .
drawal of the stock.
5. In a strip stock feeding mechanism, the com
bination of a reel for holding a supply of the stock,
skeleton end K of the strip.
means for operating on said stock, a holder for 10
gages the roller 3" and pushes it out, at the
same time rocking-the cage 335 on its shaft
mounting 303. This moves the pressure, roller
10'
'
.
The rollers ‘I91, I98 are rotated in unison
and for this purpose are interconnected by gear
ing which remains in driving connection even
said reel, means for continuously withdrawing the
stock from said reel to supply work for said op
erating means, a braking unit associated with said
when the pressure roller I 93 is moved away from ' reel holder for maintaining a substantially uni
15 the roller I91 as just described. Such a gearing form tension on said stock as it is withdrawn, and 15
comprises a drive gear 32T secured to the shaft means operating through said stock withdrawing
399 which meshes with adriven gear 322 se ‘ means and varying with the supply of withdrawn
cured to the shaft 394.
stock not yet operated on by said operating means
The rotation of the rollers I91, I93 is also inter
for varying the speed of withdrawal of the stock.
.20 mittent and is synchronized with the rotational.’
6. In a strip stock feeding mechanism, the com- 20
the rollers I 95, I 96, a chain and sprocket connec
tion joining the two parts of the feeding unit C'for
this purpose. The shaft I99 (Figs. 6, 8 and 9) of
the ?rst section roller I95 carries a sprocket 323
25 over which operates a chain 324. This chain also
passes over a sprocket 325 secured to' the shaft
399 and in this way the rotation of the rollers
I91, I93 is brought about in the same time interval
as the rollers I95, I96.
30
'
It is thought that the invention and many of
its attendant advantages will be understood from
the foregoing description, and it will be apparent
bination of a press for working on the stock, a reel
for holding a supply of the stock, rotating, with
drawing rollers for withdrawing the stock from
said reel, rotating feeding rollers for feeding said
stock into said press, and means for regulating 25
the speed of rotation of said withdrawing rollers
in accordance with the amount of stock between
said withdrawing and feeding rollers.
7. In a strip stock'feeding mechanism, the com
bination of a press for working on the stock, a reel 30
for holding a supply of the stock, rotating with
drawing rollers by which said stock is continuously
that various changes may be made in the form, - withdrawn from said reel, an electric motor for
construction and-arrangement of the parts with
35 out departing from the spirit and scope of the
invention or sacri?cing all of its material advan
tages, the form hereinbefore described bein
merely a preferred embodiment thereof.
-
I claim:
1. In a strip stock feeding mechanism, the com
40
bination of a' press for working on the stock, a reel
for holding a supply of the stock, means for with
drawing stock from said reel, means for feeding
said withdrawn stock to said press, and means
45 for controlling the speed of withdrawal in accord
ance with the amount of stock between said with;
drawing and feeding means.
2. In a strip stock feeding mechanism, the com
bination of a press for working on the stock, a reel
for holding a supply of the stock, means for con
tinuously withdrawing stock from said reel, means
for intermittently feeding said withdrawn stock
to said’press, and means for controlling the speed
of withdrawal in accordance with the amount of
55 stock between said reel and said press.
3. In a strip feeding mechanism, the combina
operating said rollers, rotating feeding rollers by
which‘said stock is fed to said press, a detector 35
associated with saidwithdrawing rollers and actu
ated by variation in the amount of stock between
. said withdrawing and feeding rollers, and an elec
tric control associated with said motor and actu
ated by said detector for governing the rotation 40
of said withdrawing-rollers.
- 8. In a strip stock feeding, notching and gaug
ing mechanism, a press for working on said stock,
means for feeding said stock to said press, means
forintermittently dissociating said feeding means 45
from said stock, notching means associated with
the die elements of said press for preparing the
stock for gauging, and gauging means operating
on said prepared stock for positioning it relative
to said die elements,- said notching and gauging 50
means operating while said feeding means is dis
sociated from said stock.
_
-
.
9. In a strip stock feeding, notching and gauging
mechanism, the combination of a press for work
ing on stock, a reel for holding the stock, devices 5;,
for continuously withdrawing the stock at vari
tion of a press for working on the stock, a reel for able speeds, a braking unit applied to said reel for
holding a'supply of the stock, a withdrawing unit ‘maintaining the stock under tension during with
for withdrawing stock from said reel,‘ means for drawal, feeding elements for feeding the with
60 feeding said withdrawn stock from said unit and drawn stock to said press, means. for controlling 60
into said press, means associated with said with- ‘
drawing unit for maintaining an excess of stock
in loop form between said withdrawing unit and
said press, and means for operating said with
drawing unit in accordance with the amount of
stock in said loop.
.. »
_
4. In a strip feeding mechanism, the combina
tion of a press for working on thestock, a reel for
, holding a supply of the stock, a withdrawing unit
70 for withdrawing stock from-said reel, means for
said withdrawing devices in accordance with the
amount of stock between said withdrawing de
vices and said feeding elements, notching and
gauging means for operating on the stock, said
notching means producing successive wedge 05
shaped notches in the stock and said gauging
means successively engaging the notches to ac
curately locate the stock both laterally and longi
tudinally in said press.
I
‘
'
'
MAGNUS' E. WIDELL.
7°
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