US2286417A - Eraser shield plate - Google Patents

Description

June 16, 1942. J. 1. HOLT ERASER SHIELD PLATE F-iled Aug 27. 1941 INV ENT OR.

I desieu'flfloli flTTomvEx v for the paper on which the erasure Patented June 16, 1942 warren stares emsur OFFICE 2,286,417 ERASER SHIELD PLATE Jessie Irene Holt, Los Angeles, Calif.

Application August 27,

2 Claims.

My invention relate to an eraser shield plate used by persons in writing on a typewriter to interpose between the sheets of papers and carbons as a protection against blotting an under copy by an erasure of what has been written on the face copy of any copy upon which a correcting erasure becomes necessary.

Not only does my shield become a background takes place but it also becomes a protecting sheet against blotting an under sheet, thus making unnecessary the common use of extra pieces of paper being interposed between the carbons to prevent blotting as is the common practice in typing.

My eraser shield not only provides the above merits and uses but also provides a catch basin, as it were; for the particles which fall from an erasure, which particles are commonly eroded from the eraser material and the fibers of the paper where the erasure takes place. In the absence of such a catch basin device attempts are usually made to brush those particles from the erasure away laterally or in any direction to keep them from falling in between the folds of the paper, or into the typing area of the keys of the typewriter or the ribbon thereof.

Thus my invention combines not only an eraser backing for the paper but also a catch basin for the erased particles and provides these results in a simple manner and labor than has heretofore been acquired by any other means heretofore known by me.

The object of my invention is to provide the simplest type of an eraser shield and of the lowest cost and handiest and most convenient to 35 use and in addition provide a service not heretofore performed by any other device before known by me.

Reference will be had to the accompanying drawing in which Fig. 1 is a perspective view of the upper portion of a typewriter in which my invention is shown in one of its working positions.

Fig. 2 is a transverse section of my invention and papers on a typewriter when used as shown in Fig. 1. I

Fig. 3 is a section of my eraser shield plate transversely of the plate.

Fig. 4 is a perspective view of the plate.

Fig. 5 is a portion of Fig. 2 drawn to a larger 50 scale.

Fig, 6 is a transverse section similar to Fig. 2, but with the shield in use over the typewriter impression roller as a support.

In Figs/1, 2 and 5 the erasure is indicated 1941, Serial No. 408,545

with less attention being performed against the backing plate of the typewriter itself which is located above the impression roller, while in Fig. 6 the position of the parts are indicated in association with the typewriter impression roller wherein the roller becomes the base support against the pressure of an erasure when it takes place. This form of Fig. 6 is the more general use of my invention. However at special instances the erasures will take place in the positions indicated by Figs. 1, 2 and 5 of the several parts when the guide plate 9 of the typewriter which directs the paper to the roller becomes the backing support 9 when an erasure takes place.

In the drawing 2 indicates the body of my eraser shield plate as to the upper portion thereof. 3 indicates the lower portion of said plate and 4 indicates the turned over edge of the said lower portion 3 which forms a catch basin into which there falls the particles dislocated by erasures from the paper. A slot 5 extends in the plate between the portions 2 and 3 which slot ends at 6, leaving intact the portion 1 of the entire plate.

The impression roller of the typewriter is indicated by 8 which normally is a common feature of typewriters generally and 9 indicates the back plate of the typewriter which guides the paper into the impression roller 8. All the other features of a typewriter as commonly in use are and may be present in using my eraser shield plate which is adapted to be used with them for the purpose described.

My invention is especially desirable to be used when a plurality of written sheets by the use of carbon sheets are to be made. In the figures a front sheet of the paper is indicated by ID, a carbon sheet by H and a carbon copy sheet by However a plurality of carbons and copies may be used with my eraser shield plate acting as backing for any sheet of paper involved in relation to erasures required in such a sheet.

, In the use of my device that sheet of paper on which an erasure is to be made may be the front sheet in the machine or the front of any copy sheet in which latter case the copy sheet becomes the front sheet as relates to the erasure and the front or other front sheets will be turned over to allow any copy to be exposed for erasure purposes.

In any case my eraser shield plate will be slid endwise across the sheet to be erased having the upper portion of the plate 2 trained in behind the sheet upon which the erasure is to as 5 take place and the edge of that sheet being .of the rubbing action of an eraser.

passed through the slot 5 leaving the lower portion 3 with its catch basin 4 on the outside of the said sheet as indicated by Figs. 5 and 6 whereupon an erasure block I 3 is used to erase anything desired ofi from paper ID or any interior copy sheets corresponding to the positions of Figs. 5 and 6.

On the completion of any erasure on any given sheet then my eraser shield plate is Withdrawn to the right freeing it from contact With the paper whereupon the shield may be upended and thereby discharge the contents of the catch basin 4 into a waste basket or entirely free from any association with the typewriter or the paper therein employed.

Instances may occur wherein the use of my device in certain special cases when the slot through which the paper is passed shall be closed at both ends. Thus requiring the paper upon which the erasure is to take place to be trained endwise up through the slot in the plate, the paper passing under the catch basin portion and over the upper portion 2 of the plate. In this situation my eraser plate will then be lifted up bodily oil from that sheet of paper instead of being drawn sidewise from it on completion of an erasure.

This invention has proven in service to be unusually desirable, practicable and a saving in time in making erasures. The erasures made when the paper is upon my plate as backing are more successfully accomplished, since there is a solid metal or still material back ground supporting the paper in form to sustain the strain This still backing for the paper is altogether better for erasing than is the case with the more or less elastic backing composed of pieces of paper as commonly employed underneath the regions where erasures are made.

I prefer to use metal for my eraser shield but in place of metal I may use any suitable material that is sufiiciently stifi and adapted to stand the service as herein described. This may be a special quality of paper or a plastic material which is adapted to perform the service described.

What I claim is:

l. A shield of the class described, having a backing member plate composed of stiff material sufficient for the purpose described, having its lower longitudinal edge curved to form a catch basin, a longitudinal slot extending lengthwise from one end in between the upper portion and the lower catch basin portion and said slot terminating inwardly from one end of the said plate, thereby leaving an integral portion of the instrument connecting the upper and the lower portions thereof on the sides of the said slot, the said plate adapted to be slid over a sheet of paper having the catch basin side over the paper and the upper main portion underneath the paper and this upper portion being the sustaining portion backing of the paperupon which an erasure is to be made.

2. An instrument-of the class described, composed of a plate having one edge curved over to form a catch basin, a longitudinal slot in the body of said plate located above and along the said catch basin edge of said plate and said slot terminating inside of one end of said plate leaving that end integral beyond the end of said slot, and the said plate adapted to be slid onto a sheet of paper whereby the paper passes through the said slot.

JESSIE IRENE HOLT.

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