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Патент USA US2297490

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Sept. 29, 1942.
I
-
H. MARTIN ET AL
PAPER GUIDE AND FEED FOR TYPEWRITERS
Filed April 7, 1941
2397390
Patented Sept. 29, 1942
2,297,490
UNITED STATES PATENT OFFICE
2,297,490
PAPER GUIDE AND FEED FOR
TYPEWRITERS
Hans Martin and Leopold Gebert, Erfurt, Ger
many; vested in the Alien Property Custodian
Application April 7, 1941, Serial No. 387,288
~
In Germany July 24, 1939
4 Claims.
This invention relates to paper carriages of
typewriters and the like and particularly to paper
guide and feeding devices thereof.
It is an object of the invention to provide a
paper guide and feed device which will insure the
even and exact feed of both thin and thick papers
in single or multiple layers.
Another object of the invention is to provide
a paper guide and feed construction for type
writers and the like in which the guide plate or
apron which underlies the platen and the feed
rollers associated therewith are constructed and
assembled as a unit which may be mounted in
and removed as such from the paper carriage
(Cl. 197-138)
ing the levers to release the feed rollers from en
gagement with the platen.
Other objects and advantages of the invention
will be apparent from the following detailed de
scription of the invention in relation to the ac
companying drawing which illustrates a pre
ferred constructional embodiment of the inven
tion by way of example. In the drawing:
Fig. 1 is a perspective view of the paper guide
and feed assembly detached from the carriage,
Fig. 2 is a perspective view from above of the
paper carriage with the platen and paper guide
unit removed,
Fig. 3 is a sectional view on the line 3-3 of
quickly and easily after the platen is removed, 15 Fig.
2, with the paper guide in operative posi
thereby facilitating access to all parts of the car
tion in the carriage,
riage by a person having little knowledge of type
Fig. 4 is a disjointed detail view of the mount—
writer construction.
ing levers for the feed rollers and guide apron,
Another object of the invention is to provide a
and
paper guide and feed construction which will 20
Fig. 5 is a detail of one of the end bearing sup
permit insertion and proper feeding of di?erent
ports for the supporting shaft of the paper guide
numbers or thicknesses of sheets at opposite sides
and rock shaft for releasing the feed rollers.
of the carriage at the same time.
Referring more particularly to the drawing, in
Another object of the invention is to provide a
paper carriage in which the paper guide apron 25 which all standard parts not necessary to an
understanding of the invention have been omitted,
and feed rollers are carried by a single shaft
ID indicates a platen roller which is removably
adapted to be mounted beneath and parallel to
journalled on the paper carriage H in advance
the platen whereby the mounting of the shaft
of an upstanding paper table [2 mounted there
correctly positions the guide and feed rollers in '
the carriage frame and in which a plurality of to on. The paper table I2 is provided with vertical
ribs l3 adjacent the ends thereof which facilitate
platen engaging feed rollers are mounted on levers
passage of the lower edge of the paper onto an
carried by said shaft and capable of independent
apron M which, in operative position, extends
action in accommodating themselves to the thick
from
the lower portion of the table l2 around
ness of the paper fed around the platen.
Another object of the invention is to provide a 35 the underside of the platen Hi to guide the paper
therearound. ‘The rear portion of the apron I4 is
novel mounting connection between the paper
dimensioned and curved backwardly to engage the
guide apron and the feed roller mounting levers
lower portion of the table l2 at the lower ends of
wherein the levers are mounted in pairs in op
the ribs I3.
posed relation on a single shaft and at their outer
The guide apron I4 is provided with a row of
ends are articulated to the paper guide apron and 40 front apertures l 5 and rear apertures I6 for front
in which the feed roller levers are held in posi
and rear feed rollers I‘! and I8, respectively,
tion on the mounting shaft by springs which serve
spaced along the length of the apron, which roll
also to rock the levers into position to press the
ers contact the platen 10. The apron l4 and feed
feed rollers against the platen.
rollers I1 and I8 are supported by spaced pairs
Another object of the invention is to provide 45 of lever arms l9 and 20 mounted on a shaft 2!.
a novel construction and method of mounting
the feed roller carrying levers on a single support
ing shaft, in which the levers in pairs are pro
The front feed rollers ll are mounted on pivot
pins 22 which extend through apertures 23 in the
ends of the forwardly extending front levers I 9
of each pair and through bracket ears 24 carried
vided with oppositely disposed bearing seats open
on one side so as to be assembled directly on the 50 by the apron I 4 at the ends of the respective
apertures IS. The pins 22 and bracket ears 24
shaft from the side thereof and held in assembled
provide an articulated connection between the
engagement with the shaft by the springs which
ends of the levers l 9 and the front portion of the
also press the feed rollers against the platen.
apron I4.
7
Another object is to provide means for spread
The rear feed rollers 18 are mounted on pivot
2,297,490
2
pins 25 which extend through apertures 25 in
the ends of the rearwardly extending rear levers
2|‘) and through slots 21 in bracket ears 28 car
ried by the apron M at the ends of the respec
tive apertures
IS.
The pins 25
extending
through the slots 2'! in the bracket ears 28 pro
vide an articulated connection between the le
vers 20 and the rear portion of the apron and
the slots 21 are arranged so that the pins can
ride therein to permit relative movement be
tween the rear feed rollers and the apron, neces
sary to effect release of the rollers from the
platen as hereinafter described.
Referring more patricularly ‘to Figs. 3 and 4,
each front lever arm H? is formed with a down
wardly opening bearing eye or notch 29 which
?ts the shaft 2| and with a rearwardly extend
ing arm 39 having an upstanding stud 3| at its
terminus.
Each lever arm 2|] is formed with an
lease shaft 40 which is already in position. The
unit is then tipped back to seat the shaft 2| in
the bearing notches 45 of the bearing blocks 42.
As the unit reaches this position, the rear edge
of the apron l4 engages the lower portion of the
table |2 abutting the lower ends of the ribs |3
and it is positioned for cooperation with the
platen. The platen H] is then mounted in the
carriage, the parts being so disposed that it
; presses against the feed rollers, as will be readily
understood. When it is desired to remove the
guide for any purpose, such as cleaning or re
pairing, the platen is ?rst removed and the guide
unit is merely lifted bodily out of the carriage.
In the operation of a typewriter or the like
equipped with the new paper guide, movement
of the release lever 4| to rock the shaft 40
causes an outward movement of the ends of le
vers l9 and 2|! and the feed rollers carried there
upwardly opening bearing eye or notch 32 which . by away from the platen. This movement is also
transmitted to the paper guide apron through
?ts the shaft 2| and with 9. depending stud
the bearing ears so that the same also moves
33 disposed in opposed relation to the stud 3| on
down, uniformly enlarging the space between it
arm 30 of lever l9 when a pair of the levers
and the platen. The pin and slot connection
are assembled side by side on the shaft 2|. A
between the levers 2B and the rear bearing ears
coiled compression spring 34 mounted on the
of the apron permits equalization of the paths
studs 3| and 33 yieldingly rocks the levers in op
of motion and spreading of the levers with re
posite directions to retain them on the shaft
spect to each other, which is necessary to the
and to press the feed rollers against the platen.
releasing operation.
The levers ii] are provided with an upwardly
With the unit construction of paper guide and
directed, rearwardly extending projecting por- :=~,
feed according to this invention, it is possible to
tion 35 which bears against the side of the re
provide carriage frames of any length with ef
spective levers 29 to steady the levers against
fective paper guides simply by mounting a plu
lateral tipping. The shaft 2| on which the le
rality of guide units end to end in the carriage.
vers are mounted is formed with spaced annular
grooves 36 constituting bearing seats in which 3- This is very important as it avoids the necessity
of making up special feed devices for the seldom
the levers are seated, the grooves being spaced
ordered, extra length carriages. In such car
apart the length of the feed rollers and serving
riages, each of the guide units has a mounting
to prevent lateral displacement of the levers on
shaft equivalent in length to the apron section
the shaft.
For the purpose of releasing the feed rollers 4.. , employed and the respective units may be sep
arately removed and installed. However, for
from pressure against the platen, the levers l9
convenience in operation, a single release shaft
and 20 are provided with forwardly extending
extending the full length of the carriage and
arms 31 and 38, respectively, which cross each
common to all of the guide units is preferably
other and are adapted to engage cutaway por
used.
tions 39 on opposite sides of a release shaft 4%
While a preferred constructional embodiment
which is provided with a release lever 4! for rock
of the invention has been shown and described
ing the same. Rocking the shaft til from the
by way of illustration, various modi?cations in
position shown in Fig. 3 forces the arms 3'! and
the details of construction and arrangement of
38 apart and rocks the levers l9 and 2% about
the parts may be resorted to without departing
the shaft 2| against the pressure of spring 351- to
from the spirit of the invention within the scope
retract the feed rollers from the platen.
of the claims.
A plurality of bearing blocks or rests 42, shown
We claim:
in detail in Fig. 5, are mounted at intervals along
1. In a typewriting machine, a carriage frame,
the length of the carriage frame beneath the
platen position. These bearing blocks, which 55 a platen removably journalled in said frame, open
mouthed bearing seats on said frame beneath
may be formed of sheet metal, include an up
said platen, a shaft removably seated in said bear
standing web 43 provided with a bearing aper
ings, spaced pairs of lever members, the lever
ture 44 for mounting the release shaft Gil and
members of each pair extending forwardly and
an upwardly opening bearing notch 65 for seat
rearwardly and having opposed open bearing
ing the shaft 2|.
From the above it will be observed that the 60 notches engaging vopposite sides of said shaft,
springs engaging opposed portions of the levers
complete paper guide and feeding unit is assem
of each pair to urge them into gripping relation
bled independently of the carriage frame. In
with said shaft, feed rolls journalled between the
the assembly, the swinging levers l9 and Eli are
respective ends of the lever arms of adjacent
' ?tted on the shaft 2| from opposite sides and,
pairs, and a guide apron articulated to the ends of
together with a pressure roller for each pair, are
the levers and supported thereby, said guide
fastened to the bearing ears of the paper guide
apron, levers, feed rollers and shaft constituting
apron by the pivot pin for the feed rollers, the
a unit assembly removable as such from the car
bearing ears being disposed between the ends of
riage after removal of the platen.
the rollers and the ends of the levers. The
70
2. In a typewriter, the combination with a
springs 34 are then mounted in position and hold
paper carriage having a removable platen and a
the levers on the shaft 2|. When all of the le
paper table in ?xed relation to said platen, paper
vers and feed rollers are thus mounted, the unit
guide and feed means comprising a unit assembly
is inserted in the carriage frame, the release
arms 3'! and 38 being ?rst slipped over the re 75 adapted to be mounted in said carriage beneath
2,297,490
said platen and removable therefrom upon re
moval of said platen, said unit assembly compris
ing a shaft, front and rear levers arranged in
pairs spaced along said shaft and having oppo
siitely opening bearing notches engaging said
3
bers, a plurality of spaced pairs of lever mem
bers pivotally mounted on said shaft, each pair
of lever members comprising a front lever and a
rear lever arranged side by side and have op
positely disposed bearing notches engaging said
shaft from opposite sides thereof, springs coact
shaft from opposite sides, a spring coacting be
ing between the front and rear levers of each pair
tween the levers of each pair and pressing them
and pressing them into engagement with said
into
engagement with said shaft, said shaft hav
shaft, feed rollers journalled at the ends of said
levers and adapted to bear against said platen, 10 ing annular grooves for seating the bearing por
tions of each pair to retain them against lateral
and a paper guide apron pivotally connected to
displacement, feed rollers journalled at the ends
and supported by said front and rear levers; a
of
the respective lever arms, and a curved guide
plurality of open mouthed bearing supports
apron pivotally connected at spaced points to
mounted in said carriage beneath the platen for
seating said shaft, a release shaft journalled in 15 said levers and supported thereby; said paper
guide and feed unit being bodily removable from
said carriage, an arm on each of said levers for
said carriage after removal of said platen; a
engaging said release shaft, said paper guide
rocking cam release shaft mounted on said frame,
apron having a rear edge portion adapted to con
arm members carried by said levers for engaging
tact a part of said paper table on said carriage
when said unit is inserted in said carriage with 20 said cam release shaft when said unit is in opera
tive position in said carriage frame to throw said
the arms on said- levers engagingsaid release
levers away from said platen to release the pres
shaft and said ?rst mentioned shaft is seated in
sure of the feed rolls therefrom, and means for
said bearings to position said paper guide apron
rocking said cam release shaft.
and feed rollers for cooperation with the platen.
4. A typewriting machine as de?ned in claim 3
3. In a typewriting machine, a paper carriage
frame, a platen removably journalled in said 25 in Which one of the levers of each pair is pro
vided with a widened ?at bearing portion bearing
frame, open mouthed bearing members mounted
on the side of the other lever.
in said frame beneath the position occupied by
the platen; a paper guide and feed unit compris
HANS MARTIN.
ing a shaft adapted to seat in said bearing mem 30
‘
LEOPO'LD GE'BERT.
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