US2198728A

US2198728A - Rotary duplicator

Info

Publication number: US2198728A
Application number: US288872A
Authority: US
Inventors: Horii Shinjiro
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-08-07
Filing date: 1939-08-07
Publication date: 1940-04-30
Anticipated expiration: 1957-04-30

Description

H p il 30, 1940."

S. HORII 4 ROTARY DUPLICATOR 2 Sheets-Sheet 1 April 30, 1940. s. HQRII ROTARY DUPLICA'IOR V Filed Aug. 7,1939 2 Sheets-Sheet 2 Patented Apr. 30,1940

UNITED STATES PATENT omen 2 Claims.

This invention relates to a rotary duplicator for use in duplicating manuscript or typewritten dtocunients, drawings and the like, employing a s enci J One of the objects of this invention is provide a rotary duplicator in which means is employed for preventing the press roller from being spoiled when there is fed nopaper to be printed. Another object of the invention is to provide a simple and effective means for adjusting the head margin of the print. a

In the accompanying drawings: Figure 1 is a side elevation of a rotary duplicator according to this invention, with the cover re- 1| moved to. show the mechanisms; l

Figure 2 is a front view showing in detail the paper feeler device; a

Figure 3 is a detail of the mechanism for controlling the movement of the press roller;

I go Figures 4 and 5 are details showing two different positions of the mechanism operatively connected to the feeler device, and

Figures 6 and 7 are details showing two different positions of the mechanism for varying the point of start of the movement of the press roller for the purpose of regulating the head margin of the print.

Referring to the drawings, upon a machine frame I there are mounted a printing drum 2 and an inking drum 3 around which an endless silkscreen 4 is passed as usual. 5 is an operating handle for rotating the drurn 2 through gears 5 and I. By operating said handle 5, rotation is also transmitted through gears 8, 9 and In to a driving shaft ll of a paper feeding device. Feeding elements l2 are operatively connected to said driving shaft it through a suitable link mechanism, so

- that the feeding elements I2 are adapted to be moved back and forth in contact with the uppermost layer of the pile of papers. A press roller l3 is journalled in bearings which are mounted on the free ends of arms I5 fixed to a rod H which is rotatably 'mounted on the frame. The abovementioned parts are of known construction, and it will not require any further description.

At an ,outer extremity of said rod l4, there is fixed another arm,l5' carrying at its free end a pin [6. Fixed to the shaft ll of the gear 9. there is a cam l8 which is adapted to engage with an '50 antifriction roller 20 provided at the upper end with the roller 2l|.- Pivoted to the vertical 85 I9 at 2i is a lifting lever 22 havingahookedportion engaging with the pin I 5 and serving to lift the press roller II. The hooked portion of said lever 22 has two engaging portions, the first engaging portion 22 and the second engaging portion 22",the former being normally ,in engagement with the pin l6 ofthe arm l5.

A paper feeler 23 is fixed to a horizontal feeler rod 24 which is journalled in the frame. Said rod 24 has fixed to one of its outer endsa controlling lever 2 5 which is adapted to engage with a proiec-' 10 tion 26 extending from the upper end of the lifting lever 22. As far as the printing paper A passes along the paper guide 21 as shown in Figure 4, the

feeler arm 23 is held in\ light contact with the paper by gravity. On the contrary, if there is no 15 of the cam l8 will be oscillated counter-clockwise,

because the projection 26 is caught by the lower end of the controlling lever 25. Consequently, the 25 pin I8 on the arm l5 will be transferred from the first engaging portion 22' into the second engaging portion 22" as shown in Figure 5. Thus, even at the end of the upward movement of the vertical .bar It the lifting lever 22 will never move the 30 am l5 for its full stroke, so that the press roller I! will not come into contact with the printing drum'2.

By operating the handle 5, the paper feeding device will be actuated as well as the printing 35 drum 2, thereby effecting automatic feed of the P pers, so that so far as-there is not anytrouble in said feeding device a sheet of paper will always pass alongthe paperguidefl almost continuously,

so that the free end of the feeler 23 does not drop into the depression 28. Consequently, the controlling lever 25 is held in an inclined position as shown in Figure 4, so that the projection '25 on the lifting lever 22 will not be caught by the lower end of the controlling lever 25, but it will be 5 moved upwardly in contact with the back of the controlling lever 25, turning the latter counterclockwise, permitting the press roller l3 to move through its full stroke to corneinto pressing contact with the sheet of paper A against the printing drum 2, thereby completing the printing operation as shown in Figure 3.

' As shown in Figure 1, an operating lever 28 is operatively connected to the lifting lever 22 by means of a bell. crank and a link 3|. By said manually actuated so as to have its hooked portion disengaged from the pin It, so that the press roller l3is always held in an inoperative position.

For the purpose of adjusting the head margin of the print, means is provided for varying the angular position of thehig'h point- (or starting point) of the cam l8 relative to the roller 2|! on the vertical bar l9 by shifting said roller 20 to the leading angular position which is in line with the line a or to the retarding angular position which is in line with line b as shown in Figures 3, 6 and 7. o is the neutral position.

32 is an adjusting'wheel for effecting the margin adjustment.- Fixed to a stud 33 of said wheel 32 is an eccentric disc 34. A horizontal bar 35 has a projection 36 which is normally held in engagement with the periphery of the eccentric .disc 34 by means of a spring 31. Pivoted at 38 to; the left end of the horizontal bar 35 is a three-armed lever 39 having a cam-like arm 40 and an actuating arm 4|. Third arm of the lever 39 is normally pulled downwardly and held in engagement with the upper edge of the horizontal lever 35 by means of a. spring 42. The cam 18 has an antifriction roller 43 which is adapted ,to act upon the camlike'armMl, and an antifriction roller 44 on the vertical bar I9 is adapted to be actuated by the actuating arm 4| .of the three-armed lever 39 at predetermined period of time during the cycle of rotation of the cam Hi. The adjusting wheel 32 is provided with a reference vmark 45 adapted to co-operate with another mark (not shown) provided on the frame for reading the rate of the margin adjustment. A pivoted arm 46 is provided for engaging with a projection 41 on the vertical bar '|9 when the latter swings to the right as shown in Figure '7, said arm 46 serving to prevent the return movement of said projection 61.

At the first part of the cycle of operation of the printing drum 2, the press roller I3 is held in its lowered position, so that the sheet of paper fed'by the feeding elements I2 is not gripped by said drum 2 and the press roller l3. As the cam shaft rotates, the cam I8 pushes the roller 20., lifting the vertical bar .l9 and, consequently, the lifting lever 22 will lift the press roller l3 through the pin |6, arm l5, rod I4, arm i5, so that the printing is started by gripping the paper A between the drum 2 and the press roller l3 as shown in Figure 3. In this position, while the roller 44 is engaged by the actuating arm 4|, it will be released from the arm 4| as the cam l8 rotates and the roller 43 thereon presses the cam-like arm 49 integral with said actuating arm 4|, so that the vertical bar 19 will tilt to the position of line b shown in Figure 7. When the roller 43 proceeds farther and releases the cam-like arm 40, as shown in' In Figure 3, when the adjusting wheel 32 is slightly rotated counter-clockwise, whereby the three-armed lever 39 is set shifted to the left, the roller 44 on the vertical bar l9 while moved upwardly will be pushed to the left by the actuating arm 4|, so that the vertical bar l9 together with the roller 20 will assume the left inclined position 1. A rotary duplicator comprising a printing drum, driving means for said printing drum, a press roller adapted to press the paper under printing against said printing drum, a paper feeding device actuated from said printing drum driving means, a rotating cam driven from said printing drum driving means, a vertical bar actuated by said rotating cam. a lifting lever pivoted to said vertical bar and having a hooked portion provided with the first and second engaging portions apress roller lifting arm having a projection and connected to bearings of said press roller,

said projection being adapted to be engaged by said first and second engaging portions alternatively, and a paper feeler device having a depending controlling lever which is adapted to control the position of said lifting lever so as to place said lifting lever in such position that the said first engaging portion engages with the press roller lifting arm when there is a sheet of paper under said feeler and in such position that the said second engaging portionengages with the press roller lifting arm when there is no paper under said feeler, so that the press roller lifting arm does not lift the press roller for its full stroke.

2. A rotary duplicator comprising a printing drum, drivingmeans for said printing drum, a press roller adapted, to press the paper under printing against said printing drum, a paper feeding device actuated from said printing drum driving means, a rotating cam driven from said print= ing drum driving means; a vertical bar having an antifriction roller engaging with and actuated by said rotating cam, a lifting lever pivoted to said vertical bar and having a hooked portion engaging with a projection belonging to an arm \connected to bearings of said press roller, and means for varying the angular position of said antifriction roller on the vertical bar relative to said cam so as to vary the time of start of lifting the press roller with respect to therotation of the printing drum, whereby adjusting the head margin of the print.

SHINJmp HURE.