|Publication number||US1387842 A|
|Publication date||Aug 16, 1921|
|Filing date||May 1, 1918|
|Priority date||May 1, 1918|
|Publication number||US 1387842 A, US 1387842A, US-A-1387842, US1387842 A, US1387842A|
|Inventors||Edwards William H|
|Original Assignee||Edwards William H|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (2), Classifications (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
W. H. EDWARDS.
APPLICATION FILED MAY I. 1918.
1,387,842. Patented Aug. 16,1921.
2 SHEETSSHEET Eye/ 7w:
WW: v j yjnicmdizawaras w. H.. EDWARDS.
TYPEWRITER. APPLICATION FILED MAY 1. 19I8.
Patented Aug. 16, 1921-.
2 SHEETS-SHEET 2- 57M: law
UNITED STATES PATENT OFFICE.
Specification of Letters Patent.
Patented Aug. 16-, 1921-.
Application filed May 1, 1918. Serial No. 231,788,
T 0 allwhom it may concern Be it known that I, WILLIAM H. E1)- WARDS, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented new and useful Improvements in Typewriters, of which the following is a specification.
The present invention relates to typewriters; and its object is to provide means for the purpose of protecting against 1njury the side edge of a paper sheet while it is being printed on by the typewrlter; and further, to provide such means which may be readily attachable to and removable from: a typewriter.
The paper sheets used in loose-leaf binders have along their binding edges notches wherein the posts, cords or other like members of the binder releasably engage to hold the sheets in the binder. When such sheets are printed on in a typewriter, the sides of these notches are likely to be engaged and be torn or mutilated by edges of the typewriters paperguide or its graduated scale, especially when the platen is turned to move the sheet backwardly. This invention provides means whereby such injury to the sheets may be surely prevented.
This object is attained by, and the invention finds preferable embodiment 111, the device hereinafter described and illustrated by the accompanying drawings, in which Figure 1 is a front view of certain parts of a typewriter to which a device embodying my invention is attached;
Fig. 2 is a vertical section of the same taken on line 22 of Fig. 1;
Fig. 3 is a View of said device;
Fig. 4 is a View of part of a paper sheet adapted for use in a loose-leaf binder;
Fig. 5 shows a screw clamp for holdlng said device;
Fig. 6 is a front view of certain parts of a typewriter in which my invention is embodied, and illustrating a modified form of the invention; I
Fig. 7 is a vertical section of the same taken on line 77 of Fig. 6;
Fig. 8 is a front view of certain parts of a typewriter in which another modified form of my invention is embodied;
Fig. 9 is a vertical section of the same taken on line 9-9 of Fig. 8; i
- Fig. 10 is an end view of a platen and paper guide showing the shield formed into a continuous belt; and
Fig. 11 is a front view of'the same.
The salient feature of my invention is the provision of a protecting member for the edge of the paper sheet, which member extends divergingly (relatively to the typewrlters rotatable platen) from any of those edges of the typewriters paper guide which are transverse to the feeding movement of the paper. Said member may be essentially a part of the paper guide itself, or it may be a separate piece which may be attachable to and removable from the typewriter.
In the embodiments of the invention chosen for illustration by the drawings and for detailed description in the body of this specification, one form of my device alone is shown in Fig. 3, and as attached to a typewriter in Figs. 1 and 2. This device is;
a shield 1 adapted to be inserted between the typewriters rotatable platen 2 and the paper gulde (designated generally 3), which in the construction shown, comprises'the rear paper shelf 4 and front graduated scale 5. This shield is preferably of thin material, as flexible spring sheet steel, so that it may be drawn between the platen and paper guide by turning the platen, in
the same manner as the paper sheets are drawn into the typewriter by the platens turnlng movement. v
In Figs. 1 and 2, the shield is showniin its operative position as thus drawn between the platen and paper guide. Suitable means are provided for holding the shield in this its operative position against the tendency of the platens rotation to move it forward or backward out of such position.
In the construction shown in Figs. 1, 2 and 3, such holding means comprises the lug or bent-over portion 6 of the rear end of the shield, which is adapted to engage the paper guide by hooking over its rear edge 7, thus preventing the forward movement of the shield out of, operative position; such means also comprises the outwardly turned spring clip 8 adapted to engage a stop on the typewriter, as the front edge of the paper guides graduated scale 5, thus preventing the rearward movement of the shield out of operative position. When it is desired to remove the shield, this spring clip or the bent-over portion 6 may. be pressed down, whereupon the turningof the platen will move the shield out of the machine. l
The shield being inserted into the typewriter as shown in Figs; 1 and 2, a sheet of paper 9 is inserted in the usual manner by turning the platen by its knob 10, the portion of the sheet adjacent its edge 11 passing between the platen and the shield. It will be seen that the sides 12 of the notches 13 in the binding edge 11 of such a sheet 9 as is adapted for use in a loose-leaf binder, cannot touch the front edge of the paper guide or graduated scale, and therefore cannot be torn or mutilated by such edge when the platen is turned in either direction.
In Fig. 5, a screw clamp 14 is shown for holding shield securely to the paper guide or other part. Clamps may be substituted in whole or in part for the clip or lug for holding the shield in place. A
It will be seen that the thinness of the shield and its smoothness, permits the free and uniform feeding of the sheet of paper by the turning of the platen, there being practically no more friction between the moving sheet and the'shield than between the sheet and the paper guide. The shield may be permanently attached in operative position, if desired, as by riveting to the paper guide or otherwise, instead of being detachably mounted on the machine.
As shown in Figs. 10 and 11, the shield may be formed into a continuous belt or band 25 mounted on rolls 26, 27 axially parallel with the platens axis, such belt being so arranged relatively to the platen, as shown, that the paper sheet 9 is inserted and moved between the platen and the inner side 28 of the belt.
' Other forms of the invention are sh own in Figs. 6, 7, 8 and 9. In these forms the sheet-edge protecting member may be essentially a part of or integral with the paper guide itself. In Figs. 6 and 7 the edge portions of the paper guide which extend transversely to the direction of the feeding of the paper, are inclined relatively to the body portion of the paper guide and outwardly from the typewriters platen. Such edge portions extending transversely to the direction in which the paper is moved or fed by turning of the platen are seen at the for ward upper edge 15 of the guide 16 and also at the forward and rearward edges 17, 18 of the orifices 19 in the guide through which the presser rolls 20 extend to engage the paper. These edges are, as shown in Fig. 7 inclined relatively to the body of the guide and outwardly from the platen, in order that such edges cannot touch and mutilate the In Figs. 8. and 9, the main portion of the paper guide 21 has a forward upper edge 22 and a portion 23 extending upwardly fronisaidedge, such extending portion being narrower than the length of said upper edge 22 but wide enough to cover the notches 13 of the paper when in proper position in the typewriter. This portion 23 extends outwardly from the platen farther than said edge 22 and in an inclined direction as shown, so that the notches 13 cannot engage and be mutilated by the paper guide.
A second upwardly extending portion 24L is provided near the opposite side of the paper guide to protect the notches from mutilation when the other side of the paper is being printed on.
The upper forward end portion of the paper guide may display markings to form a graduated scale like that shown in Fig. 1.
It will be seen that the shield 1 in operative position (see Fig. 2) extends, toward its forward extremity, from the scale 5 (which is an edge of the paper guide transverse to the papers feeding movement) divergingly relatively to the platen; and that in like manner the portions 15, 17, 18, 23 and 2st of the paper guide extend divergingly (relatively to the platen) from edges of the paper guide which are transverse to the papers feeding movement; and further, that the portions of the belt 25 which pass over the rolls similarly diverge from the platen.
The invention being intended to be pointed out in the claims, is not to be limited to or by details of construction illustrated or described.
1. A flexible shield adapted to be drawn by the turning of the rotatable platen of a typewriter between said platen and the typewriters paper guide, and means for holding the strip in said indrawn position against movement by the platen.
2. A flexible shield adapted to be drawn, by the turning of the rotatable platen of a typewriter, between said platen and the typewriters paper guide, and having an outwardly turned clip adapted to engage a stop on the typewriter to hold the shield against reverse movement.
A flexible shield adapted to be drawn, by the turning of the rotatable platen of a typewriter, between said platen and the typewriters paper guide, and having an outwardly turned spring clip adapted to engage a stop on the typewriter to releasably hold the shield against reverse movement.
1. A flexible shield adapted to be drawn, by the turning of the rotatable platen of a typewriter, between said platen and the typewriters paper guide, and having adjacent one of its ends 0. lug adapted to engage one edge of said guide to hold the strip against movement in one direction and having also an outwardly turned clip adjacent its other end adapted to engage the opposite edge of said guide to hold the shield against movement in the opposite direction.
In testimony whereof I have hereunto set my hand at Grand Rapids, Michigan, this 29th day of April, 1918.
WILLIAM H. EDWARDS.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US5092690 *||Sep 28, 1990||Mar 3, 1992||Texas Instruments Incorporated||Portable printer|
|EP0398556A2 *||May 3, 1990||Nov 22, 1990||Texas Instruments Incorporated||Portable printer|
|U.S. Classification||400/578, 400/642|