US1829579A

US1829579A - Duplicating machine

Info

Publication number: US1829579A
Application number: US298322A
Authority: US
Inventors: E P Barrow
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-08-08
Filing date: 1928-08-08
Publication date: 1931-10-27
Anticipated expiration: 1948-10-27

Description

Oct. 27, 1931.

J. R. BEAcH 1,829,579

DUPLI CATING MACHINE Original Filed Aug. 8, 1928 Join/f 56a 07/ INVENTOR 0 wrmzss: W ATTOR NEY Patented on. 27, 1931 UNITED S ATES PATENT OFFICE JOHN B. BEACH, OF VIfiGI'NIA; E. P. BAR-ROW ADKINIQIRATOB OI SAID JOEN B. BEAGH, DECEASED Y n'crmcnrmc iracnmn Application filed August 8, 1828, Serial K052983213. Renewed June 3, 1931.

This invention relates to duplicating machines of the hand operated type, wherein a number of printed copies may be cheaply and quickly made by passing a roller over the blank stock.

An object of the present invention is the provision of a machine of the above character wherein the roller will be normall held to properly position a stencil at the beginning of each operation and automaticall turned to such position at the end 0 each operation. 7

Another object of the invention is the pro vision of a duplicating machine which utilizes a perforatedroller, an inking pad and a stencil, all arranged so that excess ink upon the pad will pass into the cylinder instead of blotting and blurring the printed matter,

the perforated c linder also providing means for applying in to the pad without remov in either the stencil or the pad.

ith the aboveand other objects in view,

the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompan ing drawings and pointed out in the appen ed claim.

In the drawings a Figure 1 is an elevation of a duplicating machine constructed in accordance with the invention. a

Figure 2 is a top plan view.

Figure 3 is a section on the line 3-3 of Fi re 1.

igure 4 is an enlar d fragmentary section on the line 44 of igure 3.

' Referring to the drawings in detail wherein like characters of reference denote corre' sponding parts, the reference character 10 indicates'a hollow cylinder which ispreferably formed-of metal and whose periphe is perforated as indicated at 11. This cy inder has a shaft or spindle 12 extendingtherethrough which is surrounded by a sleeve 13. Secured upon the ends of the spindle 12 are'the outer ends of a yoke 14 and the latter is provided with a handle 15, by means of which the cylinder may conveniently pass over a surface to be rinted.

so Secured around e periphery of the cylinder is an inking pad 15 whose-opposite ends enter a depression'16 which extends across 18 extends across the periphery of the cylinder and has one of its ends hingedly mounted as shown at 19, while its opposite end is engaged by a spring latch 20 so as to clamp the ends of the inking'pad and stencil in place. By reference to Figure 4 it will be seen "that the depression and bar 18 are so constructed in proportion that a practically unbroken printing surface will be provided.

In order to properly position the stencil at the beginning of each printing operation, the cylinder has extending from one end a pin 21 which is adapted to engage the yoke 14 and limits rotation of the cylinder in either direction. The spindle 12 is surrounded by a coiled spring 22 which has one of its ends secured to the cylinder as shown at 23 and its opposite end secured to the spindle 12.

At the beginning of the printing operation, the pin 21 will position the stencil properly so that the roller ma be convemently passed over the surface tobe 1printed. Durmg this movement of the re er, the spring 22 will be tensioned, and when the cylinder is raised from the work at' the end of the stroke the spring will automatically return the cylinder to starting position. This greatly facilitates operation of the machine and materially increases its output.

By perforating the c linder, excess ink (if any) within the pa 15 will be forced into the cylinder instead of blotting or blurring the Work. In addition, the end 24 of the cylinder is in the form of a spider, so that the end of the cylinder is o n and. by the use of a brush, ink may be istributed over the inner periphery of the cylinder and will pm through the openings to ink the pad 15 without removing either the pad or the stenc The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as pro erly fall within the scope of the appended aim.

Having described the invention what is claimed 1s:

I In a hand operated duplicating machine, a. cylinder having a depression in its periphe a stencil secured tothe periphery of said cy inder formovement over a surface to be printed when the cylinder is' revolved in one direction, a bar having one of its ends PIV- otally secured to one end of the cylinder at 7 one end of the depression, a sprin latch secured to the other end of the cylin er-for removable en agement with the other end of the bar to 0 amp the stencil upon the cylinder, a handle for said cylinder, means carried by the cylinder and en ging the handle to limit rotation of the cy inder in opposite directions, and means to yieldingly resist rota tion of said 0 linder in one direction and return said 'cy 'nder to starting position at the completion of each fprinting operation. In testimony whereo I afiix m signature.

JOHN R. EACH.