US2400991A - Sheet printing and crimping - Google Patents

Description

May'28 1946. A, 1 HE 2,400,991

SHEET PRINTING AND CRIMPING v Filed Sept. 25, 1942 3 Sheets-Sheet l ,2 INVENTOR.

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A. L. HESS SHEET PRINTING AND CRIMPING Filed Sept. 25. 1942 3 Sheets-Sheet 2 I w m "A i Q INVENTOR \Hrih ur L Hess.

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composed of two or more sheets.

, and possibly one or crimping dies that Patented May 1946 Arthur L.

of West Virginia Hess, Cincinnati, Ohio, assignor to Ditto, Incorporated, Chicago,

Ill., a corporation Application September 25, 1942 Serial No. 459,726

2 Claims. (Cl. 270-52) The present invention relates to crimping and printing sheets and has for its principal purpose the provision of a method whereby a plurality of sheets may be handled together from a stack and thereafter fastened together into a novel unit In the making of various records it is oftentimes essential'to have not only a single sheet but a carbon sheet more additional sheets attached thereto for record purposes. As an example of the type of sheet assembly to which I refer in the making of copies by the wet process duplicating method it is now common practice to use so-called "master sets." A master set comprises a clear sheet which may have certain "matter printed thereon, a hectograph carbon sheet, and in many instance The matter of assembling the the master sheet presents a are finally fastened together into a single unit. In my co-pending application, Serial No. 459,725. filed September 25, 1942, I have described and claimed an apparatus whereby two or more sheets may be printed upon and fastened together by crimping as a part of the printing operation. The present invention is particularly advantageous in connection with that apparatus.

a backing sheet. carbon sheet with problem until they A preferred form of in connection with a printing machine of the general type referred to in the foregoing application wherein the printing bed and the impression cylinder are provided with cooperatin that are gripped by the cylinder grippers so that the sheets thereafter may be handled as a single unit. loose sheets may be Of the stacked upon the stack table press and are picked up in units of two or more sheets by the suction device of the press and transferred as units to the cylinder without previously securing the sheets to each other.

The details, objects and advantages of the invention will appear more fully as the description proceeds, reference being had to the acconi panying drawings wherein a preferred form of the inventionisshown.

In the drawings:

Fig. 1 is alongitudinal sectional view through a printing press showing the printing bed, the impression cylinder and the suction feeding device;

Fig. 2 is an enlarged sectional view taken through the suction feeding device showing it in the act of lifting a paper unit, this view being taken on the line 2-2 of Fig. 3

the invention is disclosed are adapted to crimp sheets,

In accordance with the present invention Fig.3 is a sectional view taken on the line 3-3 ofFig. 1;

Fig. 4 is a perspective view of a sheet assembly prior to its being operated upon by the printing press;

Fig. 5 shows the printed upon by the press;

Fig. 6 is a perspective assembly as printedupon; and

Fig. 'l is a sectional view taken on the line 1-! Fig. 6 showing the nature of the crimping. Referring now in detail to the drawings I have shown therein a general embodiment of a Miehle cylinder press of the type wherein the bed reciprocates vertically. In Fig. 1 of the drawings the numeral I0 designates the bed of the press in which the chase II is mounted. An impression cylinderis shown at H. Thisimpression cylinder carries a-gripper bar I 3 upon which a series of gripper pins I 4 are arranged to grip and hold sheets on the impression cylinder while they are' being pressed against a printing plate mounted on the chase II. In accordance with my application hereinbefore mentioned the gripper bar I! and the chase H are provided with cooperating crimping dies I5 and It, the purpose of which is to crimp together two or more sheets that are held by the gripper pins H as the sheets are passed between the impression cylinder and the printing plate.

The crimping is of the nature shown in Figs. 6 and 7 of the drawings. That is, the dies are serrated so as to deform the sheets at a plurality of sections indicated at IT in Fig. 6 into the form shown in Fig. 7 where the top sheet l8 and the bottom sheet l9 are bent into corrugated form by the dies and wedged together by the force of compression so as to bind the two sheets together. As pointed out in the prior application, this crimping action is done in the same cycle of the press as the printing. It will be noted also that' interferes with the adherance of the sheets to each other, and a much better bond can be obtained by leaving an area of the carbon sheet. where the crimping is to take place, free of car bon. j

The printing press also embodies a feed table c ped paper as it is being view of the completed 22 to which the sheets ar fed from a stack table 23 by a suitable suction feeder indicated generally at 24. The mechanism is such that as sheets are fed by the suction device 24 to the table 22 the stack tabl- 23 rises. This mechanism however is of no moment to the present invention and is common in presses of this type. The suction device will pick up a plain sheet and transfer it to the table 22 in timed relation to the operation of the cylinder l2 and the bed It). My invention is directed to accomplishing the transfer of more than-one sheet at a time by the suction device without the necessity of changing the standard suction device. 4 Referring now to Figs. 1 to 4, inclusive, of the drawings, it will be noted that the suction device comprises a swinging arm 26 and a frame 26 carried by the arm upon which there are a plurality of suction heads 21 and 28. These uction-heads are connected by two tubes 29 and 30 to a pipe 3| in the frame 26 and this pipe is connected by a tube 32 to a suitable suction pump not shown. The construction of the suction heads 21 and 28, as illustrated in Fig. 3, is such that a rim 33 surrounds a suction opening 36 so that when the suction head is let down upon'a sheet of paper l8 air may be evacuated in the area when the rim 33 is on top of the sheet, thus causing the sheet to adhere to the suction head and be carried with it when the suction head is lifted. In accordance with my invention I make it possible to lift a plurality of sheets, that is, two or more sheets, by means of the suction heads 21 and 28 and by perforating all but one of the series of sheets that are to be handled together with small perforation such as are indicated at 35 and36 on the sheet I 8; The sheets are arranged in groups on the stacking table with unperforated sheets l9 directly beneath one or V more of the sheets IB that are perforated. Now

when the suction head 21 and 28 are lowered upon the stack of sheets and the air is exhausted from the area within the rims 33, the perforated sheet or sheets permit the vacuum to be applied to the non-perforated sheet is so that when the suction heads are lifted the non-perforated sheet I9 and all the sheets superposed thereon will be lifted as a unit and carried by a suction device to the table 22. There the several sheets are gripped by the gripper fingers It and held on the impression cylinder 12 in the same manner as a single sheet would be held. As the cylinder and printing plate are brought together for the printing operation the 'sheets held by the gripper fingers are crimped together by the crimping dies l and I8 at the beginning accuser ished product isan assembly of sheets such as is shown in Figs. 6 and '1. The sheets are held together by the crimping and may be used as a single unit until such time a .it is desired to separate them. It is obvious of course that this crimping permits ready separation without damage to the sheets other than the slight disfigurement caused by the crimping.

The present invention is not limited in its scope to the printing of the sheets since it is obvious that by leaving out the printing plate a plurality of, sheets maybe picked up together by the suction heads and crimped together by the crimping dies for use thereafter as a set of sheets such as the master set" hereinbefore referred to. The crlmped together set of sheets may be used in many ways.' The fastening of the sheets together does not interfere with their very use in a typewriter or a printing press. Moreover the sheets, when separated, may be used singly for any purpose desired The small perforations and the small crimped areas occupy a limited amount of the sheet surface close that there is practically no loss surface. The method of to one edge so in the available sheet handling the sheets makes it possible to use the standard sheet transfer equipment of the press without any changes whatsoever.

of the printing operation. The resulting finperforations will reach both sheets of a While there have been shown and described certain embodiments of the invention, it is to be understood that it is capable of many modifications. Changes, therefore, may be made without departing from the scope of the invention as described in the appended claims, in which it is the intention to claim all novelty inherent in the invention as broadly as possible, in view of the prior art.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A method of providing assemblies of a plurality of sheets capable of being handled as a single unit, which comprises perforating all but one of the assembly of sheets with at least one perforation, stacking the sheets with the unperforated sheets beneath the perforated sheets of the unit, transferring the sheets by applying a suction over the perforations. u v

2. A stack of sheetscom'prising groups 'arranged one ontop of the other, each grou including a bottom sheet which is unperforated and at least one top sheet having therein spaced perforations whereby a suction applied about the unit and enable the sheets of a group to betransferred together.

ARTHUR L. HESS.

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