US2036090A - Erasure shield - Google Patents

Description

Mm'ch 31, 119360 1!... E. LINDSAY ERASURE SHIELD Filed Sept. 5, 1935 Adz/F0706 54m IN V EN TOR.

atented Mar. 31, 1936 MN l TED STATES PATENT OFFICE Application September 6 Claims.

The invention relates to erasure shields, and has for its object to provide a device of this character with means for collecting and gripping debris incident to an erasing operation, particularly when making an erasure in typewriting on the platen and through an aperture in the shield.

A further object is to form the dbris collecting trough from a flexible member which normally springs towards the shield for the dbris holding operation.

A further object is to form the collecting trough by providing a flexible strip secured thereto adjacent one edge and of relatively thin material whereby the trough as a whole may be placed between sheets of paper, particularly carbon sheets when the same are on the typewriter roll, thereby allowing the collection of the erasures or dbris and the trough end of the device to be received between the sheets on the roll, or platen.

A further object is to form the trough by bending up a portion of the shield body and stapling said portion to the shield body for forming a flexible trough member.

With the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawing, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawing:

Figure 1 is a perspective view of the shield.

Figure 2 is an end elevation of the shield.

Figure 3 is a perspective view of a modified form of shield, showing troughs on opposite edges thereof and multiple erasure apertures.

Figure 4 is a side elevation of a conventional form of typewriter platen and key guide, showing a plurality of sheets around the platen, and the shield in position after an erasure on an inner second sheet.

Referring to the drawing, the numeral I designates a rectangularly shaped shield formed from flexible material so that it may be bent to conform to the curvature of a conventional form of typewriter platen 2. The device may be formed from a heavy cardboard or celluloid, and applicant does not limit himself as to material. The edge 3 of the flexible shield has formed integral therewith an extension flange 4, which is bent upwardly onto the shield I and is secured thereto by means of staples 5. The flange 4 forms a receptacle 6 or trough, in which the dbris 1, from an erasure operation, is collected and is 5, 1935, Serial No. 39,328

gripped by the inward flexing of the flange 4 as clearly shown in Figure 4.

By providing the gripping operation for the dbris 1, it will be seen by referring to Figure 4, that the particles will be held against coming out of the trough when the device is used on the typed second sheet 8. In the position shown in Figure 4, the shield is disposed between the second sheet 8 and the carbon sheet 9, and it is shown as flexed to straight position after the erasure operation, therefore it will be seen that the dbris is gripped in the trough 6, and this can be further held if desired by the operator compressing the receptacle 6 during the shield removing operation. By making the lower end of the trough 6 relatively thin as shown in Figure 4, it is obvious that it can pass a considerable distance downwardly between the sheets towards the type guides l0.

Referring to the modified form shown in Figure 3, in this form the same numerals apply, however instead of a single flange 4 along one edge 3, the device is provided with flanges 4 at the opposite diagonal points thereof, thereby facilitating the placing of the device between the sheets during the manipulation, and providing a double shield, either one of which may be used as desired. The body I is provided with a plurality of erasure apertures ll of conventional form, through which the side of an eraser is passed for the erasing operation.

From the above it will be seen that an erasure shield is provided with a trough in which erasure particles may be collected during the erasing operation and gripped so that they can be removed from the machine without danger of any of the particles falling between the pages or into the machine, thereby obviating the difficulty now experienced with trough devices which do not have a gripping operation and which are generally too wide to be inserted between the sheets around a typewriter platen adjacent the printing point.

The invention having been set forth what is claimed as new and useful is:

1. The combination with an erasure shield, of means carried thereby for receiving and gripping erasure particles.

2. The combination with an erasure shield, of means carried thereby in which erasure particles will fall during an erasure operation, said last named means having means whereby the erasure particles may be gripped therein.

3. The combination with an erasure shield, of a trough carried by one edge thereof, said trough having walls normally flexing towards each other carried by one edge thereof for receiving and gripping erasure particles which fall therein, said trough comprising a wall secured to the shield and in combination with the shield forming the trough.

6. An erasure shield comprising a flexible member, an integral member carried by one edge of the flexible member and folded thereon and means connecting the integral member to the flexible member for forming an erasure receiving 10 trough.

LAURENCE EDWIN LINDSAY.

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