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GB400042

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Molecule
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[5][_]
Carbon
(3)
Publication
_________________________________________________________________
Number GB400042A
i»?
Title
_________________________________________________________________
EN Title Device for replacing carbon paper by one or more ink-ribbons
for the manufacture of copies with the typewriter
Abstract
_________________________________________________________________
[Class 100 (iv).] One or more duplicatingribbons extending along the
platen of a typewriter are clamped during the letterspacing movement
of the carriage, and receive during return of the carriage a
feed-movement corresponding to the length of the previously typed
line.
In the mechanism, shown in Figs.
1 and 5, a duplicating-ribbon 4 is wound on spools 1, 2 mounted on a
plate attached to the carriage 17.
The duplicating-ribbon is guided along the platen 18 by means of
rollers 6, 7, 8, guides 11, 12, and a clamp 5 consisting of fixed and
hinged members 13, 16 having a co-operating groove and projection.
The member 13 is moved to clamp the duplicating-ribbon by means of a
finger 14 on a paper-bail 15 which is raised on return of the
carriage.
The spools are rotated by means of a carriage-propelling spring-drum
19 which is connected by a band 9 to the framework and, by means of a
lever 10, can be moved into engagement with either spool to reverse
the feed.
During typing, the duplicating-ribbon is held in tension by the clamp,
and on return of the carriage, the paperbail is raised to release the
clamp, and the spool 1 or 2 imparts a feed-movement equal to the
length of the previously typed line.
More than one duplicating-ribbon
additional spools may be provided.
may
be
wound
on the spools, or
A clamp may be arranged at each end of the platen.
Description
_________________________________________________________________
!AN, ---! E F
PATENT SPECIFICATION
M11- --- R Convention Date (Holland): Sept. 3, 1932. W ' A- '
Application Date (in United Kingdom): Jan. 26, 1933. No. 2509/33.
Complete Accepted: Oct. 19, 1933.
COMPLETE SPECIFICATION.
Device for Replacing Carbon Paper by One or more Ink-ribbons for the
Manufacture of Copies with the Typewriter.
I, JOIIANNES CORiELIS VAN TETTBiRODE, of Fazantweg 24, Apeldoorn,
Holland, of Dutch nationality, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following
statement:The invention relates to a device for a typewriting-machine with one
or more copying ribbons carried by spools in order to obtain copies by
said ribbons instead of using carbon paper.
A device is known in which the feeding of the copying ribbon is
coupled with the 3.5 moving of the carriage, but in that case the said
feed is only a step by step ratchet wheel feed. The feecl-pawvls are
operated
by
a line-spacing mechanism and the lengths of the
copying-ribbons extending along the platen are provided with clamps
which are automatically released during the feed.
According to the invention the ribbon is moved through a distance
corresponding to the length of the previous typed line. In this way a
simple device can be provided that is sufficient and which can be
mounted on any typewritingmachine with very little means and So
trouble.
Such a device, however, has the drawback that without special means
the moving of the carriage becomes too heavy as the ribbons must be
kept under sufficient tension by means of the spools to prevent the
shifting
of these ribbons in a vertical direction. Therefore,
according to the invention the device is provided with means for
clamping during the letter-spacing movement of the carriage the
lengths of the copying-ribbons that extend along the platen, and these
clamps are automatically released during the return of the carriage.
Thereby the right position of the copying-ribbons is obtained and
maintained
independently
of
the
re-winding
device
for the
ribbonspools.
A tensioning device which is particu00 larly suitable consists in
arranging a clamp at one or both ends of the typing roller which in
closed position keeps the ribbon along the said roller under tension.
[Ppice 11-] Preferably this clamp is constructed in such a way that on
closing, it pulls on 55 the ribbon which passes through it whereby
also the opening and closing of the clamp can be connected with the
movement of the paper frame or other part, which is operated normally
by the 6o adjustment from line to line.
W'ith this construction the device is such that during the typing, the
copying ribbons stand still and therefore are not displaced with each
operation of a key 65 over the distance of a letter as is the case
with the typing ribbon for the original.
The motion of the copying ribbons then only takes place by the return
motion of the carriage and in view of the fact 70 that therewith
normally also, the adjustment on the next line is connected, for this
purpose the combination of this adjustment with the release of the
tensioning device is very suitable. 75 A further advantage of the
device according to the invention is that it is exceedingly suitable
for the arrangement of the spools for the copying ribbon with vertical
spindles on one or more plates, in 80 which they are secured to the
frame of the carriage or of the machine, sideways of the typing
roller. By this means, the arrangement of the device on existing
machines is not only facilitated, but also 85 the guiding of the
ribbons over spindles which cross each other is avoided, which is of
importance for the lasting of the ribbon and for the ease with which
the ribbon may be wound from one spool to the other.
The accompanying drawings show a constructional example, in which:
Figure 1 is a plan view of the typing roller with the device according
to the 95 invention mounted on the typewriter, Figure 2 is a plan view
of the extra ribbon in the condition in which the tensioning device is
opened, Figure 3 the same with the tensioning i00 device closed,
Figure 4 is a view of one end of the typing roller with the tensioning
device and a part of the paperbail, Figures 5 and 6 are side views of
the 105 same with the tensioning device in opened A 4'NO 61A 61 C)
400,042 and closed positions respectively.
The spools 1 and 2 are arranged on a plate 3, which on one side is
connected with the carriage of the typewriter by screws and on which
spools, the ribbon 4 serving as the copying material is wound and
unwound.
The ribbon 4 passes from spool 1 over the guiding roller 6 through the
tensioni0 irxg device 5, along the typing roller and then over the
reversing roller 7 along the typing roller through the tensioning
device 5, over the guiding roller 8 to the spool 2.
5 One end of the pull string 9 is connected with the frame of the
typewriter and the other end is connected with the spring motor which,
by means of a lever 10, is brought into operative connection either
with spool 1 or with spool 2.
During the yping, the spring of the spring motor is released and
during the return motion of the carriage is tensioned, whereby at the
same time spool 1 or 2 winds up the ribbon 4.
The
tensioning device 5 in this construictional example consists of a
clamp formed by a fixed member 16 connected with the carriage and by a
part 13 connected hingedly with the carriage. By bringing the hinged
part 13 against the fixed member, the parts of the ribbon guided
through the clamp are tensioned. this clamping takes place by means of
the lip 14 connected with the paper-bail 15. The paperbail 15 is in
the ordinary way moved together with the device for line changing with
which also the carriage is pushed towards the right.
Therefore during this return motion of the carriage the clamp device
is put out of action, as it is opened by the tension of the ribbon(s)
so that the copying ribbon 4 can then be displaced untensioned. As
soon as, however, the paperbail 15 comes again against the tvping
roller, the lip 14 pushes the clamp into the closed position, by which
the parts of the ribbon along the typing roller are tensioned.
By providing the hinged member 13 of the clamp with a slot which
corresponds with the back 16 of the fixed part, on closing the clamp a
dragging action is exerted on the ribbon, by which the tension is
increased.
In order to keep) the ribbon in front of the typing roller at the
desired mutual distance, it is guided at the roller 7 through an eye
11 and at the tensioning 60 device 5 on both sides of a guiding pin
12.
Instead of two ribbon parts along. the typing roller any other number
can be used.
To use more ribbon parts either more 65 spools can be used or more
than one ribbon can be wound on the spools. Also more reversing
rollers 7 can be arranged on the carriage (on the left and right), so
that also one of the ribbon rollers can be 70 arranged at the other
end of the typing roller. The tensioning device can be used for any
other number of ribbons.
The tensioning device 5 and the roller 7 are arranged as close as
possible to the 75 ends of the paper roller in order to keep the
distance between these two elements as small as possible, by which the
effect
of
the tension is as great as possible. ilaving now
particularly described and 80 ascertained the nature of my said
invention and in what manner the same is to be performed, I declare
that what I
Claims
_________________________________________________________________
claim is:1.
In
a
tvpewriting-machine
provided
85 with one or more
copying-ribbons carried by spools on the carriage, means associated
with the spools for feeding the copying-ribbons through a distance
corresponding to the length of the previously 90 typed line, means for
clamping during the letter-spacing movement of the carriage the
lengths of the copvingribbon that extend along the platen, and
automatic means for releasing the clamps 95 during the return of the
carriage.
2. A device as claimed in Claim 1 in which the clamp is provided with
a slot in which fits a projection arranged on the other limb. 100
3.
A device as claimed in Claims 1 and 2 in which the copying-ribbons
are wound on or unwound from spools rotating about vertical spindles,
which are arranged on one or more plates, which are preferably 105
secured sideways of the typing roller in the frame of the machine, a
lip being connected with the paper bail for the operation of the
clamping device.
4. The improved device for obtaining 110 duplicate copies of typing,
substantially as hereinbefore described and shown in the accompanying
drawing. Dated this 18th day of January, 193g. MARKS and CLERK.
Redhill: Printed for His Majesty's Stationery Office, by Love and
Malcomson, itd.-1933.
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