US2301386A - Paper guiding attachment for typewriters and similar machines - Google Patents

Description

' Nbv, 10, 1942.

F. EIBERT 2,301,386 PAPER GUIDING ATTACHMENT FOB TYPEW'QITERS AND SIMILAR MACHINES I Filed Dec, 2, 1937 inveni'or: Frilg Ei 5011' by his" afiorney Patented Nov. 10, 1942 a r PAPER, GUIDING ATTACHMENT FOR TYPE.-

WRITERS AND SIMILAR MACHINES Fritz Eibert, Dresden, Germany; vested'in the Alien Property Custodian Application December 2, 1937, Serial No. 177,683 In Germany December't, 1936 8 Claims.

The invention presented here concerns an innovation n typewriters specifically a new attachment for the inserting'of the paper into the machine.

In machines so far known the paper is inserted between the paper guiding table and the platen and by turning the platen is advanced between the latter and the pressure rolls. By the friction which is exerted by the pressure of the feed rolls upon the paper it is further advanced by turning of the platen until it appears again in front of the roller. In all these constructions the operator must reckon with the fact that he will have to straighten and arrange the paper before inserting it into the machine as after feeding it around the platen. The'pressure feed rolls do not catch hold evenly of the paper and allow it to become crooked especially when several layers of writing-copy and carbon paper are inserted. Therefore with the known arrangements it is impossible to insert a more or less thick layer of paper, consisting of several sheets of writing and carbon paper in such a way that these papers appear again exactly edge upon edge at the front of the platen; furthermore there exists the imperfection or bad feature that during the advancing of the paper between the pressure feed rolls and platen the carbon paper or the thin copypaper is wrinkled or misplaced, a fact which gives the carbon copies a soiled appearance.

The attachment according to the invention presented here corrects these existing faults. By it the paper properly arranged is inserted into the machine and is not disarranged during the advancing between the rollers, furthermore it is brought at once under the paper holding bar.

It is therefore no'longer necessary that the latter be first lifted by the operator and the paper is drawn under it. Due to the arrangement according to my invention the writing upon the extreme upper edges is effected without the least difficulty and the papers appear evenly arranged edge upon edge at the front of the platen.

In the accompanying drawing one embodiment of the new attachment according to the invention is represented.

Figure 1 is a fragmentary view in perspective on an enlarged scale illustrating the invention;

and v Figure 2 is an end elevation.

The typewriter in which this invention is embodied may be standard in all-respects with the exception of the paper feeding devices hereinwhich the invention is concerned are shown in the drawing.

As shown, the typewriter is provided with the stationary paper guiding table 85, at the lower edge of which is hinged a swingable paper guide 81, which may be attached to guide 85 by ashaft 86a. Swingable paper guide 81 is provided at its lower edge with spaced extensions 88 terminating in hook-like ends, which are normally maintained lightly against the platen 2| by means of small springs 86!).

At each end of platen 2 I is a circular extension 2Ia around which is rotatably positioned a ring 9|. These two rings 9| are connected by a bar 82. Pivotally mounted on bar 92, as at 93, and partially surrounding the platen is a paper clamping plate 94, the free edge of which is provided with spaced projections 95, between which the hooked ends 88 of swingable paper guide 81 pass. At each end of this edge of clamping plate 94 is attached a spring 96, which substantially continues the curvature of plate 94.

Upon each ring 9| is mounted a catch 91, which is swingable laterally upon a pivot 98, and is normally maintained in the position shown in Figure 1 by means of a spring 99 and lug I99, which engages with stop 9Ia on ring 9i.

Adjacent each end of the platen and affixed to a shaft IUI, which is rotatably mounted in suitable bearings (not shown) in the frame of the machine is an operating lever I03. Each of these operating levers is provided with a cam-like device IM, which, whenthe lever is swung forward, will engage leaf spring 96 and wrap it around ring 9| until its end engages latch 91, pushes the latch aside and snaps under it, whereupon it is securely held by the latch. This also moves paper clamping plate 94 and particularly its toothed edge 95 into close engagement with platen 2|.

On lever I03 is pivotally mounted as at I06 a second lever I95,'which is normally held with respect to lever I93 in the position shown in Figure 1 by means of spring I I9 and stop I09. When in this position the rear end IE8 of lever I05 will just contact with swingable paper guide 81. Also, on lever I95 is a projection or portion after described. Therefore, only those parts with I91 which also serves as a stop for a purpose hereinafter to be explained.

On the frame of the machine are fastened catch-release prongs III, Which at the proper time, as will be explained, open catches 91. One of the rings 9I is also provided with a stop H2 to arrest the motion of the rings and clamping plate 94 at the proper time.

The device operates as follows:

Assume that several sheets of paper are to be inserted simultaneously into the machine. With the device in its normal position, i. e., with the hook-like ends 88 of guide plate 81 resting against the platen and clamping plate 94 swung away from the platen, the operator places the paper in the usual manner against stationary guide 85 and lets it drop onto the hooks 88 of guide plate 81. After the paper is properly arranged, the operator pulls lever I83 forward with the result that cam-like elements I04 engage leaf springs 98 and wrap them around rings 91 until their ends engage latches 91, push them aside and snap under them, as shown in Figure 2. This also causes clamping plate 94 to move forward so that the paper is clamped, held tightly be-' tween its edge 95 and the platen. If the platen is now turned, clamping plate 94 will turn with it, and the sheets of paper will be carried along without disturbing their alinement. The operator may then move lever I03 back to its normal position.

After the platen has been turned so that clamping plate 94 appears at the front of the platen, as shown in Figure 2, lug we on latch 91 will engage arm III, by which the catch will be swung aside and the end of leaf springs 96 released. Thereupon clamping plate 94 also swings away from the platen and the paper is thereafter held and moved by the usual devices, provided for the purpose. Since there may still be some frictional engagement between clamping plate 94 and the paper, further rotary movement of clamping plate 94 is prevented by means of stop I I2 on top of the rings 9|, which stop is so positioned that it will engage with face or stop 01 on lever I05, simultaneously with the releasing of the leaf springs 96.

After the sheets have been removed from the machine the operator pushes lever I05 towards the rear which will permit stop H2 to free itself from stop I01, so that bar 92 and clamping plate 94 can slide back to their original positions below the platen. Continued motion of lever H35 will also swing lever I93 towards the rear so that end I08 of lever I05, which heretofore has been merely in contact with swinging paper guide 81, pushes this guide away from the platen to provide room for bar 92 to slide between its hooklike ends 88 and the plate. Then lever [55 is released and both levers return to their original position, whereupon the device is in condition to receive the next lot of paper.

I claim:

1. In a typewriter, the combination of a platen, a stationary paper-guidingdevice, a second paper-guiding device movably mounted on the stationary paper-guiding device having hook-like projections on an edge adjacent the platen adapted to support in accurate edge alinement sheets of paper, a clamping plate so mounted as to be movable towards and away from said platen, a carriage frame, a service lever pivotally mounted thereon and provided with'means for moving the clamping plate towards said platen when said service lever is swung in one direction, and with means for moving the movable paper-guiding device away from the platen when said service lever is swung in the opposite direction.

2. In a typewriter, the combination of a platen, a stationary paper-guiding device, a second-paper-guiding device movably mounted on the stationary paper-guiding device having hook-like projections at an edge adjacent the platen adapted to support in accurate edge alinement sheets of paper, a ring slidably mounted upon each end of the platen, a clamping plate attached to said rings for holding the papers against the platen, a carriage frame, a service lever pivotally mounted thereon and provided with means for moving the clamping plate towards said platen when said service lever is swung in one direction to clamp against said platen said sheets of papare previously alined upon said movable paperguiding device, means for maintaining said clamping plate in clamping position independently of said service lever, a second service lever pivotally mounted upon said first service lever and movable therewith in both directions, means for holding said movable paper-guiding device against said platen when said service levers are swung in said first-mentioned direction, and means on said second service lever for swinging said movable paper-guiding device away from said platen when said service levers are swung in the opposite direction.

3. In a typewriter, the combination of a platen, a stationary paper-guiding device, a second paper-guiding device movably mounted on the stationary paper-guiding device having hook-like projections at an edge adjacent the platen adapted to support in accurate edge alinement sheets of paper, a ring slidably mounted upon each end of the platen, a clamping plate attached to said rings for holding the papers against the platen, a carriage frame, a service lever pivotally mounted thereon and provided with means for moving the clamping plate towards said platen when said service lever is swung in one direction to clamp against said platen said sheets of paper previously alined upon said movable paper-guiding device, means for maintaining said clamping plate in clamping position independently of said service lever, a second service lever pivotally mounted upon said first service lever and movable therewith in both directions, means for holding said movable paper-guiding device against said platen when said service levers are swung in said firstmentioned direction, and means on said second service lever for swinging said movable paperguiding device away from said platen whensaid service levers are swung in the opposite direction, and means for holding said clamping plate in clamping position independently of said first service lever, and means for automatically releasing said clamping plate from paper-clamping position when said sheets of paper have been fed around the platen.

4. In a typewriter, the combination of a platen,

a stationary paper-guiding device, a second paper-guiding device movably mounted on the stationary paper-guiding device having hook-like projections at an edge adjacent the platen adapted to support in accurate edge alinement sheets of paper, a ring slidably mounted upon each'end of the platen, a'clamping plate attached to said rings for holding the papers against the platen, a carriage frame, a service lever pivotally mounted thereon and provided with means for moving the clamping plate towards said platen. when said service .lever is swung in one direction to clamp against said platen said sheets'of paper previously alined upon said movable paper-guiding device, means for maintaining said clamping plate in clamping position independently of said service lever, a second service lever pivotally mounted upon said first service lever and movable therewith in both directions, means for holding said movable'paper-guiding device against said platen when said service levers are swung in said first-mentioned direction, means on said second service lever for swinging said movable paperguiding device away from said platen when said service levers are swung in the opposite direction, means for holding said clamping plate in clamping position independently of said first service lever, means for automatically releasing said clamping plate from paper-clamping position when said sheets of paper have been fed around the platen, and means for releasing said movable paper-guiding device to permit it to resume its original position adjacent the platen operated by swinging the second service lever in said opposite direction with the first service lever in its original position.

5. In a typewriter, the combination of a platen, a paper-guiding device, the lower end of which is ofiset to form a hook-like ledge adjacent said platen upon which the entering edges of inserted papers may rest in accurate registry, a clamping plate for clamping said inserted papers against said platen, means for causing said clamping plate to clamp said papers against said platen without otherwise moving them and for then moving said guiding device away from said platen, means for rotating said platen and said clamping plate when in paper-clamping position and means for automatically releasing said clamping plate after a partial rotation of said platen.

6. In a typewriter, the combination of a platen,

a stationary paper guide, a second paper guide which is movable with respect to said first-mentioned paper guide and is provided at its lower edge with hook-like means for supporting sheets of paper with their edges in alinement, a clamping plate for holding the sheets of paper against the platen, a supporting arm connected to each end of said clamping plate provided with a forklike portion through which the shaft of said platen projects, and which is slidable transversely of said shaft, a shifting lever and cam latch for drawing said clamping plate towards said platen into paper-clamping position and for retaining it in this position, a service lever for operating said shifting lever and cam latch and. also for moving said movable paper guide out of paper-supporting position so that the papers can rotate with said platen without interference from said movable paper guide.

7. In a typewriter, the combination of a platen, a paper guiding device, the lower end of which is offset to form a hook like ledge adjacent said platen upon which the entering edges of inserted papers may rest in accurate registry, a clamping plate for clamping said inserted papers against said platen, means for causing said clamping plate to clamp said papers against said platen without otherwise moving them, and for then moving said guiding device away from said platen, and means'for rotating said platen and said clamping plate in unison when said clamping plate is in clamping position.

8. In a typewriter, the combination of a platen, a paper guiding device, the lower end of which is offset to form a hook like ledge adjacent said platen on which the entering edges of inserted papers may rest in accurate registry, a clamping plate adapted to clamp said inserted papers against said platen, mountings for said clamping plate, each provided with an elongated slot adapted to receive the shaft of the platen, means for moving the clamping plate and its mountings transversely of the shaft of the platen and for moving said paper guiding device towards and away from said platen, and additional means adapted to turn the platen, clamping plate and its mountings in unison.-

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