US2253215A

US2253215A - Apparatus for printing

Info

Publication number: US2253215A
Application number: US382980A
Authority: US
Inventors: Walter Clarence Lee
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-04-08
Filing date: 1941-03-12
Publication date: 1941-08-19
Anticipated expiration: 1958-08-19

Description

Aug. 19, 1941. g W T R 2,253,215

APPARATUS FOR PRINTING Original Filed April 8, 1939 3 Sheets-Sheet 1 VIIIIIIIA \\\\\\\\\\"d I Inventor (/err se Z9? M/rer A tto rue Orieinal Filed April 8, 1939 s Sheets-Sheet 2 Inventor (/4rehc e lee l/a. //er A Home Aug. 19, 1941. c. L. WALTER APPARATUS FOR PRINTING 7 Original Filed A ril 8. 1939 3 Sheets-Sheet 3 Inventor Alton/e1 Patented Aug. 19, 1941 APPARATUS FOR PRINTING Glarence Lee Walter, St. Louis, Mo.

Original application Ap 266,814. Divided and ril.8, 1939, Serial; No. thisapplication March 12, 1941, Serial No. 382,980.

2 Claims. (Cl. 103-114) invention relates, to improvements inprinting apparatus. for use. in printing from stencils according to. the method forming the subject matter of my U. S. Letters Patent No. 2,245,629, dated January 17, 1941, and of which the instant application is a division.

The invention is designed with the particular object in view of providing apparatus whereby pictorial illustrations, and also lines of type, may be reproduced in a job press at a minimum cost.

Another object is to equip any platen type job press for printing from a stencil, type high, and without any change in the basic design of the usual platen job press.

Other and subordinate objects are also comprehended by my invention, all of which, together with the precise nature of my improvements will be readily understood when the succeeding description and claims are read with reference to the drawings accompanying and forming part of this specification.

In said drawings- Figure 1 is a view in top plan of a pla'ten job) press equipped according to my invention,

Figure 2 is a view in perspective illustrating the stencil sheet mounted in the stencil frame,

Figure 3 is a view in transverse section taken on the line 3--3 of Figure 2 looking in the direction of the arrows,

Figure 4 is a view in side elevation illustrating the stencil frame mounted in the press,

Figure 5 is a view in perspective of the inking p Figure 6 is a view in section of said pad,

Figure '7 is a view in vertical section, partly in front elevation, taken on the line 1-1 of Figure 4,

Figure 8 is a view partly in side elevation and partly in vertical section taken on the line 8--8 of Figure '7, and

Figure 9 is a view partly in transverse section and partly in top plan illustrating the inking pad fitted into the stencil frame and against the stencil sheet.

Referring to the drawings by numerals, according to my invention, a photographic stencil sheet I of fibrous material, and otherwise characterized, as disclosed in my aforesaid copending application to which attention is invited, is mounted in a stencil frame 2 of a suitable material, such as card-board, said frame having an opening 3 formed therein slightly smaller than the stencil sheet and over which said sheet is secured by gluing the edges thereof to said frame around said opening, as best shown in Figure 9.

The open frameZ constitutes a reinforcement on one side of the stencil sheet l. around the printing areasolely.

The stencil frame 2,, with, the stencil. sheet I therein, is. attached in a press of the usual job printing type having the platen 4 operated by the usual operating mechanism represented at 5, to close onto a printed chase 6 locked in the press in the usual manner to be inked by inking rollers, not shown. In such presses, as will be understood, the platen 4 carries a pair of work, or sheet, grippers 9 operative, by mechanism represented at Hi, to clamp opposite edges of the work sheet, not shown, to the platen 4 prior to closing of the press and to release said sheet when the press is opened.

The stencil frame 2 is attached to one of said grippers 9 with the stencil sheet I facing the platen 4 and between the frame 2 and the platen 4 so that when said grippers assume clamping position, said sheet will lie flat aganist a work sheet imposed on the platen. For this purpose, the stencil frame 2 is secured to the inner side edges of said one gripper 9 to extend inwardly therefrom over the work sheet preferably by means of a pair of thin, semi-rigid, resilient clips ll spanning the gripper 9 and the upper and lower edges of the stencil frame 2 and clampingly engaging the gripper and frame so as to prevent accidental displacement of the latter.

An inking pad l2, for the stencil sheet I, is provided comprising a block l3 of wood of the proper size to fit, with a slight clearance, into the stencil frame 2, said block being covered with a thin layer H! of sponge rubber faced with a layer [4 of smooth rubber. The described inking pad I2 is clamped in the printing chase 6, covered side outermost, by any of the usual clamping means adjunctive to such forms, as represented at l5, and so as to press the stencil sheet I against the work sheet when the press is closed. The inking pad I 2 is of the proper thickness to be type high so that it and the stencil sheet I may be used in printing with the type it in the usual form clamped to the chase 6 for job printing.

As will be understood, when the press opens up the inking rollers, not shown, will distribute ink over the inking pad l2 and when the press closes up for the impression, the rubber layer I4 will enter the stencil frame 2, press against the stencil sheet I and thereby force ink through the fibrous area of the image, or pattern, onto the work sheet imposed on the platen soas to print the image on the work sheet. The inking pad [2 may be built up in the chase 6 to vary the tone of printing as desired and in any suitable manner. The stencil sheet may be run separately, or concurrently, with the printing of type. To remove the stencil frame 2 and stencil sheet I it is merely necessary to detach the clips I I.

The foregoing will, it is believed, suffice to impart a clear understanding of my invention, without further explanation.

Manifestly the invention, as described, is susceptible of modification without departing from the inventive concept and right is herein reserved to such modifications as fall within the scope of the subjoined claims.

What I claim is:

1. In printing apparatus, a chase, a type form clamped therein, a work supporting platen movable toward and from the form to eifect printing, a stencil having a printing area pervious to ink, means to support said stencil in front of the work operative to engage one face of the stencil with the work during movement of the platen toward the form, a type high inking pad in said chase for engagement with the other face of said stencil under movement of the platen to force the work during movement of the platen toward the form, a type high inking pad in said chase for engagement with the other face of said stencil under movement of the platen to force ink therethrough onto the work simultaneously with printing by said type on the work, said means including a stencil supporting frame having an open side facing said pad, and said pad fitting into said frame against the stencil, said pad including a layer of sponge rubber, and a smooth resilient facing sheet covering said layer.

. CLARENCE LEE WALTER.