US2704145A - Attachment for a writing machine - Google Patents

Description

March l5, 1955 L., K. FLEISCHMANN 2,704,145

ATTAcm/IENT FOR A WRITING MACHINE Filed June 10, 14953 2 Sheets-Sheer?I l March 15, 1955 L. K. FLEISCHMANN ATTACHMENT FOR A WRITING MACHINE Filed June l0, 1953 2 Sheets-Sheet 2 United States Patent O ATTACHMENT FOR AA WRITING MACHINE Lester K. Fleischmann, Chicago, Ill.

Application June 10, 1953, Serial No. 360,732

4 Claims. (Cl. 197-126) This invention relates to an attachment for a writing machine, and more particularly to a device for holding a series of carbon packs in position between strips of continuous form stationery. This device is adapted to be attached to carriages of typewriters or other writing machines.

The primary object of this invention is to provide a device for holding packs of zigzag transfer material accurately in position in interleaved relation with continuous form stationery. A rear blade holds the pack, and a front blade prevents the inadvertent unfolding of the carbon strip. The blades also relieve the underlying strips of the weight of the superposed strips.

Another object is to provide a device which will hold both the strips of transfer material and the leader sheet firmly in place during use, and a fresh length of transftelr material can be released without disturbing the leader s eet.

The invention is illustrated in a preferred embodiment in the accompanying drawings in which:

Fig. 1 is a plan view;

Fig. 2, an end elevational view;

Fig. 3, a vertical section taken as indicated along line 3--3 of Fig. l;

Fig. 4, a front elevational view;

Fig. 5, a fragmentary plan sectional view taken as indicated on line 5 5 of Fig. 4;

Fig. 6, a fragmentary vertical sectional view taken as indicated on line 6--6 of Fig. 5; and

Fig. 7, a fragmentary vertical sectional view taken as indicated on line 7-7 of Fig. 6.

In the embodiment illustrated, a pair of spaced supports 8 and 9 are secured to a channel-shaped base member 10 by cap screws 11. The supports each have a series of parallel front slots 12, and a series of parallel rear slots 13. It is preferred that the rear slots be offset slightly downwardly from the front slots for reasons which will later be made apparent.

Each of the rear slots 13 is adapted to receive the shouldered end portions 14 of a holding blade 15. The function of the holding blade is to hold a pack of transfer material 26 firmly in position upon the carriage of a typewriter. Of course, a series of these blades may be positioned one above the other in the slots when several carbons are to be used.

A checker blade 16 has shouldered end portions 17 to lit into the front slots 12. Again, several of the checker blades may be positioned in superposed relation in the front slots. The holding blades and checker blades may be identical in construction.

Locking means are provided for releasably securing the holding blades and checker blades in the slots. The locking device shown is a closure member 18 made of wire, having a lower arm 19 journaled in a recess 20 of the supports 8 and 9. The open end of the recess 20 is closed by the washers 21 held in place by the cap screw 22, and by the top of the base member 10. The shank of the closure member 18 rests in a slot 23 in the spaced supports, and the linger 24 snaps over the node 25 on the top of the support. It is a simple operation to remove or add blades. The closure members 18 are unlatched and pivoted outwardly of the device. Blades can then be inserted in the appropriate slot and the closure member once again pivoted to locking position.

The pack which the present device is designed to handle has a folded leader sheet 27 which encloses an attached zigzag folded transfer strip. The rear folds 2,704,145 Patented Mar. 15, 1955 ICE of the transfer strip are spaced from the fold in the leader sheet the same distance as the rear edge of the holding blade is spaced from the rear edge of the checker blade. One holding blade and one checker blade are provided for each pack.

In placing a pack of zigzag folded transfer material 26 in the device, the leader sheet 27 is placed around the holding blade 15, and the folded edge 28 of the leader sheet is pulled firmly against the edge 29 of the holding blade 15. The leader sheet may be held against lateral shifting on the holding blade 15 by either a piece of pressure sensitive tape or a metal clip. The checker blade 16 is positioned normally in the first upwardly offset front slots lying in a plane just above the holding blade 15.

When fresh transfer material is to be withdrawn from the pack, the blade 16 is withdrawn from its slots and replaced in an underlying fold of the transfer material after which it is reinserted in its supporting slots and locked in position. The zigzag folded transfer strip lying above the blade 16 may then be drawn out a distance limited by the checker blade.

When in operating position, the leader sheet rests over the pack and protects the supply of transfer material.

The slight upward offset of the front slots with respect to the rear slots provides space for the folded supply of transfer strips lying beneath each checker blade 16.

In practice, several packs of transfer material are engaged upon the device in the above described manner. Fig. 3 shows two such packs in position but additional packs may be added if additional record strips are used.

In order to release a length of transfer material, it is merely necessary to unlock the front closure members, allowing the checker blade to be swung out or withdrawn and repositioned in the next fold of the transfer strip. This checks the transfer material along the next rear fold, but releases transfer material above this fold for use. More transfer material can be released by replacing the checker blade between folds farther down the pack. As much transfer material as needed may be withdrawn without disturbing the position of the leader sheet on the holding blade in any way. Thus, the leader sheet preserves lateral alignment.

The device can be used with fanfold stationery or open web. When used with fanfold stationery, a slitter (not shown) may be mounted on the holding blade.

The foregoing detailed description is given for clearness of understanding only and no unnecessary limitations should be understood therefrom, for some modifications will be obvious to those skilled in the art.

I claim:

1. A writing machine attachment for holding between strips of continuous form stationery a folded leader sheet containing an attached zigzag folded strip of transfer material, comprising: a base member; a pair of upwardly extending spaced supports, each of said supports having spaced front and rear blade receiving parallel slots; a holding blade mounted in a rear slot to engage the folded edge of a leader sheet; a checker blade mounted in an adjacent front slot to engage a fold in a transfer strip attached to the leader sheet; and locking means for releasably securing said checker blade in a front slot.

2. An attachment as specified in claim l, in which each of the rear slots is downwardly offset from its adjacent front slot.

3. An attachment as specified in claim l, in which a blade locking device is provided for releasably securing the holding blade in a rear slot.

4. An attachment as specified in claim 3 in which each of the slots has an open end, the blade locking device closing the open end of the rear slot mounting the holding blade, and the locking means closing the open end of the adjacent front slot mounting the checker blade.

References Cited in the le of this patent UNITED STATES PATENTS McAlvin Aug. 4, 1942

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