US2519384A - Copying device - Google Patents

Description

Aug. 22, 1950' v G. E. LEBERMANN 2,519,384

COPYING DEVICE Filed March 13, 1945 2 Sheets-Sheet 1 INVENTOR. GLEN E. LEBERMANN BY Cfi/VW" WZ. ATTQRNEI S Aug. 22, 1950 s. E. LEBERMANN COPYING DEVICE 2 Sheets-Sheet 2 Filed March 13, 1945 INVENTOR. GLEN E. LEBERMANN ATTORNEYS Patented Aug. 22, 1950 UNITED STATES PATENT OFFICE.

COPYING DEVICE Glen E. Lebermann, Rock Island, 111.

Application March 13, 1945, Serial No. 582,474

2 Claims. (Cl. 120--32) (Granted under the act of March 3, 1883, as

amended April 30, 1928; 370 0. G. 757) The invention described herein may be manufactured and used by or for the Government for serves to receive and feed paper from which copies are to be made. It has been found that the efllciency and the accuracy of the typist can be increased by means capable of feeding the paper at intervals corresponding to the intervals in the rotation of the typewriter platen.

. This is especially true in cases in which sheets of comparatively large width must be copied in machines having long carriages, or in instances where extensive tabulating is required.

It is accordingly one of the principal objects of the invention to provide a copying attachment for use with writing machines such as typewriters or the like and to provide the attachment with feed means operated by a movable part on the machine.

An important object of the invention is to provide an attachment that may be mounted on and carried by the carriage of a typewriter, or by the corresponding parts of similar writing machines.

Still another object is to provide driving means by which the feed mechanism of the copying attachment may be driven by the platen of the Writing machine.

It is another object of the invention to provide variable speed means in the driving means so that the feeding mechanism may be adapted to be synchronized with the platens of typewriters or the like which have different sizes of type.

Still other objects of the invention are to pro- :vide a driving element adapted to be secured to the shaft of the platen in place of the usual operating knob, which element has a stub shaft on which the knob may be remounted; and to provide a copying attachment having a supportin structure including a casing that may be folded or otherwise moved to a retracted position when not in use.

Other objects and features of the invention will become apparent as the disclosure is more fully made in the following detailed description of a preferred embodiment of the invention as shown in the accompanying sheet of drawings, in which! Fig. 1 is a perspective view of the invention shown in position on a typewriter;

Fig. 2 is an enlarged fragmentary view illustrating one end of the casing and mounting structure and showing the means by which the paper-feeding mechanism is driven from the platen of the typewriter;

Fig. 3 is an end elevational view of the structure shown in Fig. 2, parts of the end Wall of the casing being broken away;

Fig. 4 is a longitudinal cross sectional View showing the details of the variable speed pulley; and

Fig. 5 is an enlarged sectional view taken on the line 5-5 of Fig. 3 and showing that portion of the casing to which the mounting means is connected.

As stated above, the invention has its greatest utility in connection with typewriters and the following description will pertain to such use; however, it will be understood that the invention may be similarly used with other types of machines and that the present disclosure is not to be taken as limiting the application of the invention.

Fig. 1 shows a typewriter of conventional design which has the usual carriage [0 in which is mounted a conventional platen II. The platen l l includes stub shafts extending at opposite ends thereof, only one of which is shown at I2 (Fig. 2).

Although the present invention is applicable to a copying device which may be mounted independently of the typewriter or other machine, it is preferred that the device be provided as an attachment that may be mounted directly on the typewriter carriage so that it may be moved transversely of the typewriter with the carriage. Referring particularly to Figs. 1 and 3 the attachment comprises a main supporting structure including a casing I3 open at its rear side as at M and having end walls I5. The front wall of the casing is preferably formed as a continuous sheet I6 which begins at the upper rear portion of the casing l3 and is turned downwardly and forwardly and rolled as at H. A bottom wall portion I8 is also preferably formed as a continuous sheet that begins at the lower rear portion of the casing and curves forwardly and upwardly into a rolled portion 19 (Fig. 2) extend ing longitudinally of the casing. The rolled portions I1 and I9 are spaced vertically and the space therebetween provides a feed opening 20.

The rolled portion I9 carries therein a hi pin 2I extending longitudinally of the casin and carrying a line or guide bar 22. This bar substantially overlies the feed opening 26 but is mounted in such a manner that it permits the feeding of paper through the opening 28 and between the upper edge of the bar and the rolled portion IT on the front wall I6 of the casing I3, as will presently appear. A torsion spring 23 is carried by the hinge Ipin 2I and engages the casing I3 and the line bar 22 to urge the line bar lightly toward the rolled portion I! of the front wall I6.

A feed roller 24 is journaled at its opposite ends in the end walls I of the casing and is provided at one end with a shaft extension 25 on which is mounted part of a driving means for rotating the roller in synchronism with the typewriter platen. The details of this driving mechanism will be set forth below.

The casing I3 is provided with an upwardly curved, longitudinal shield 26 that is disposed longitudinally in the casing and slightly above the feed roller 24. This shield is adapted to hold excess rolled paper, as will appear below. Each end wall I5 carries on a pivot 21 an upwardly extending arm 28. These arms carry a shaft or rod 29. Which extends longitudinally of the casing and which is provided with small rubber rollers 30, only one of which is illustrated in the drawings (Figs. 2 and 3). A tension spring 3| is connected between one arm 28 and a pin on the inner face of an end wall I5 of the casing and serves to urge the arms 28 and thus the rollers 30 toward the feed roller 24.

As best shown in Figs. 3 and 5 each end wall I5 is provided with means for carrying the supporting structure in a manner adapting the casing for attachment to and mounting on the carriage I0 of the typewriter. Each end wall is cut out at its lower rear portion and is fitted with a block 32. This block has provided therein a bore that extends longitudinally with respect to the casing and in which is carried a short shaft 33 having an enlarged outer end 34. The block 32 is secured to the end wall by a pair of screws 35 (Fig. 3). A wing bolt 36 is threaded into the block 32 on an axis at right angles to the axis of the shaft portion 33 and engages this shaft portion to secure the casing I3 to the supporting means for adjustment about the axis of the shaft 33. The enlarged outer portion 34 of the shaft 33 has preferably formed integrally therewith a rearwardly and downwardly extending supporting member 31, the lower end of which passes through a bracket 38 secured to the carriage I0. The bracket 38 carries therein a wing bolt 39 engageable with the member 31 and providing means whereby the member 31 may be adjusted vertically with respect to the carriage. It will be understood, of course, that similar supporting structure is provided at the opposite end of the casing and that this supporting structure 00- operates similarly with the opposite end of the carriage.

Inasmuch as the casing is mounted on the shaft portions 33 of the supporting member 31 it may be tipped or folded about an axis longitudinally thereof and may thus assume the position indicated in broken lines in Fig. 1.

As indicated above, it is preferred that the feed roller 24 in the casing I3 be driven by the platen I I of the typewriter, and it is an important feature of the present invention to provide convenient driving means adapted for this purpose. Accordingly, there is provided a driving element in the form of a pulley 40 having at one side thereof a hub 4! that serves to receive the end of the shaft I2 of the platen. The pulley 40 is thus located on the platen shaft in the position usually occupied by the conventional operating knob, herein indicated at 42. The pulley is provided with a stub shaft 43 on which the operating knob 42 may be remounted, thus providing means by which the platen I2 may be manually operated in the usual manner.

The feed roller shaft 25 carries thereon a variable speed mechanism in the form of a composite pulley 44. As best shown in Fig. 4 this mechanism preferably includes a first pulley member 45 keyed or otherwise secured to the feed roller shaft 25 and provided with an axially extending sleeve portion 46 having its outer end threaded as at 41. The pulley member is provided with an internal annular recess 48 adapted to receive a sleeve extension 49 on a second pulley part 50. The second pulley part fits over the sleeve 46 of the first pulley part and includes an annular radial wall portion 5|. A compression spring 52 is interposed between this annular wall portion and an annular abutting portion on the first pulley part 45. The sleeve portion 46 of the first pulley part 45 is provided with a longitudinally extending keyway 53 and a key 54 cooperates between the keyway and the second pulley part 5|) to mount the two pulley parts for rotation to-- gether. An adjusting means, preferably in the form of a knurled knob 55, is threaded on the threaded portion 41 of the sleeve 46 and has its inner face provided with radial serrations adapted to cooperate with complementary serrations formed on the outer radial face of the second pulley part 50. Adjustment of the knob 55 serves to vary the relative axial positions of the pulley parts 45 and 50 and thus to vary the width and effective depth of the V-groove formed between the pulley parts. An endless, crossed belt 56 is trained about the variable speed pulley 44 and the pulley 40 on the platen shaft I2. The belt is crossed to provide for reverse rotation of the feed roller 24, the directions of rotation being indicated by arrows in Fig. 3.

The variation in pitch of the pulley 44 as provided by the adjustable knob 55 is adapted to accommodate varying platen speeds. This circumstance will naturally occur when the copying attachment is used with typewriters having different sizes of type, such as elite or pica, since the increments of rotation of typewriter platens vary according to, and are governed by, changes in type sizes. As best shown in Fig. 2 the adjusting knob 55 is marked with the circumferentially spaced letters E" and P, indicating respectively the positions to which the knob will be turned according to which type size occurs in the typewriter to which the casing I3 is attached. One of the serrations on the pulley part 50 is suitably marked to provide an index adapted to register with either of the E or P" serrations.

As best shown in Fig. 3, the rear opening I4 in the casing I3 provides means by which paper may be inserted between the roller 24 and shield 26 and between the rollers 24 and 30. A sheet of paper is indicated generally by the numeral 51 and is shown as passing through the feed openin 20 in the front wall of the casing and upwardly between the line bar 22 and the rolled portion H on the front wall 95 of the casing. The line bar is provided with means by which it may be moved away from the feed opening 20. This means preferably takes the form of an arm 58 pivoted at one end on the bar 22 and having therein a hooked slot 59 engageable with a pin 69 carried by the end wall l of the casing l3. When the bar 22 is moved outwardly about its hinge 21 the hooked end of the slot 59 enables the arm 58 to drop downwardly on the pin 63, thus locking the bar in outwardly spaced relation to the casing I3. This arrangement provides for facilitating the inserting of paper through the feed opening 29. When the paper is in position the arm 58 is released and the spring 23 urges the bar lightly against the paper.

The shield 26 provides means for supporting the rolled bottom end of the paper, as is clearly shown in Fig. 3 and thus it is not necessary that the bottom end of the paper be trailed over the rear of the carriage.

In th use and operation of the preferred embodiment of the invention herein set forth the casing 13 is mounted on the carriage of a typewriter by means of the supporting members 31 and brackets 38. The adjusted height of the casing with respect to the carriage may be fixed by means of the wing nuts 39. The platen knob 42 is removed from the stub shaft at one end of the platen and the pulley 40 is substituted therefor. The platen knob may be remounted on the stub shaft portion 43 of the pulley 50. The belt 59 is trained about the pulleys 40 and 44 and the necessary adjustment, according to the size of type, is made by means of the adjusting knob 55. The sheet of paper from which a copy is to be made is fed into the casing 13 through its rear opening 14, under the curved shield 26, and between the feed roller 24 and guide rollers 30. The line bar 22 is moved outwardly over the transverse opening in the front wall of the casing and the paper is fed forwardly and upwardly through this opening. The line bar is then released and is allowed to return to the position in which it rests against the sheet of paper and serves as a guide for the printed material or other characters on the paper. If the sheet of paper has any great length it may be lightly rolled and rested upon the curved shield 26. It will be seen that the paper thus arranged in the casing l3 may be easily followed by the typist. The feed roller 24 is by means of the driving mechanism 404456, synchronized with the typewriter platen so that when the typist rotates the platen to begin a new line the feed roller 24 simultaneously feeds the sheet of paper 51 so that a corresponding new line is presented on it.

It will be noted that the attachment is provided as a unit that is readily adaptable to various kinds of typewriters. The position of the casing may be adjusted vertically to accommodate changes in the length of the belt 56. This adjustment may also be made to accommodate the eye levels preferred by different operators, in which cases, however, it may be necessary to substitute other belts for the belt 56. As previousl stated, the casing may be folded to a retracted position when not in use. It will be necessary, of course, in this case to remove the belt 56.

It will be understood that the foregoing description pertains to only a preferred embodiment of the invention and a preferred application of that embodiment to a particular instance.

It will be apparent however that numerous modifications and alterations may be made in the preferred structure illustrated without departing from the spirit and scope of the invention as defined in the appended claims.

I claim:

1. In a copying attach-ment for .a typewriting machine having a carriage and a platen journaled in said carriage for rotation about a first axis, a frame mounted on said carriage for movement as a unit therewith, said frame comprising a pair of laterally spaced parallel side plates having semi-circular tops and bottoms, each plate being adjacent a respective end of the platen, a copy feed roller journaled by and between said plates at the bottom portions therof for rotation on a second axis above and parallel with said first axis, a first sheet having opposite edges joined to and following the contour of the corresponding top and front edges only of said plates, and having its lower edge parallel with said axes and adjacent the front of said feed roller, a second sheet having its opposite edges joined to and following the semi-circular contour of the bottom portions only of said side plates, said bottom sheet having its forward edge terminating at little below the lower edge of said first sheet, to form a slot therewith, means guiding a copy sheet above and in contact with said roller, thence through said slot and upwardly over said first sheet, a pulley fixed to said roller for rotation as a unit therewith, a crossed belt extending about said pulley and a second pulley rotatable as a unit with said platen, said guiding means including a guide bar pivoted at its lower longitudinal edge adjacent and parallel with the forward edge of said second sheet, and means yieldingly urging said guide bar into position overlapping said slot.

2. An attachment as recited in claim 1, and means for adjustably mounting said frame upon the typewriter carriage, said mounting means comprising first and second aligned stub shafts journaled in the rear lower portions, respectively, of said side plates, a pair of L-shaped supporting members each having the end of one arm fixed to and extending horizontally rearwardly from a respective stub shaft, the other arm of said supporting members extending vertically downwardly, brackets fixed to said carriage each slidably receiving a corresponding vertical arm of said members, and means releasably securing each said vertical arm to its bracket.

GLEN E. LEBERMANN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 589,330 Bingham Aug. 31, 1897 736,005 Peak Aug. 11, 1903 950,846 Ford Mar. 1, 1910 951,697 Peetz Mar. 8, 1910 1,009,455 Utsch Nov. 21, 1911 1,015,481 Draullette Jan. 23, 1912 1,719,667 Marrable July 2, 1929 1,958,417 Caesar et al May 15, 1934 2,153,103 Stevens Apr. 4, 1939 2,299,981 Harlam Oct. 27, 1942 FOREIGN PATENTS Number Country Date 374,565 Italy Aug. 31, 1939

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