US1732653A - Printing-press attachment - Google Patents

Description

B. MARGWARTH PRINTING PRESS ATTACHMENT Oct. 22, l929.`

Filed June 25, 1928 ILLI r INVENTOR.

BOL/VERMARGWAPTH BY af ATTORNEYS i Patented 0st. 22,

EWE

BOLIVER MARGWARTH, 0l? MEVPRT BEACJEB, CALFORNIA PRINTING-PRESS ATTACHMENT Application filed. June 25, 19529.

My invention relates to improvements in printing press attachments, and it consists in the combinations, constructions and arrangements hereinafter described and claimed.

In the Miehle vertical press, the feeder table supports a large pile of stock ready for feeding, and this stock has the upper sheets thereof kept slightly separated from each other by a liet of air which is directed against the edges of the sheets. Suction shoes carried by the separator frame lift the uppermost sheets one at a time from the stock and convey them to the printingl mechanism. These shoes press down upon the upper sheets and expel the layers of air between the sheets, thus causing at certain times more than one sheet to be removed from the stock by the suction shoes.

llhe purpose of the present invention is to prevent the suction shoes from actually bearing weight on the uppermost sheet and pressing the sheet d own upon the next sheet. ln this way the layer of air between the two uppermost sheets will not be disturbed, and the shoes will remove only one sheet at a time from the stock.

The invention consists of a simple attachment which is designed for the Miehle printing press, but it is obvious that the device may be changed slightly to tit presses of other constructions. The purpose of the device is to prevent the suction shoes from pressing down the uppermost sheet of paper.

Other objects and advantages will appear in the following specification, and the novel features of the device will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawing forming a part of this application, in which Figure l is a sectional view through a portion of the Miehle printing press showingmy attachment operatively applied thereto;

Figure 2 is a top plan view of the attachment; Figure 3 is a longitudinal section through the device; and

Figure 4 is a perspective view of the bracket.

In carrying out my invention, I make use Serial No. 288,032.

of a feeder table l that is automatically raised by a rod 2 as the stock 3 carried by the table is being depleted. Feeder arms 4 carrying suction shoes 5 move from the stock 3 to the printing portion of the press, not shown. An air jet 6 directs air against the front edges of the uppermost sheets of the stock and keeps these upper sheets separated from each other by layers of air.

The shoes 5 are carried by a separator frame 7, and the frame is prevented from allowing the shoes to rest nupon the upper sheet by an arm 8 (see Figure 2) that has a platform 9 bearing against the frame 7. The arm is held in a position to dispose the shoes 5 above the upper sheet, and this is accomplished by an adjustable foot 10 that is movable along the arm 8 and is secured in adjusted position by means of a set screw 11.

The endof the arm 8 opposite tothat of the platform 9 is threaded as at 12 and carries lock nuts 13. The threaded portion is received in opening` 24 in bracket 25. The bracket 25 is secured to a cross rod 14 by means of a clamp 1'?.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood.

During the normal operation of the machine, the arms 4 swing back and forth carrying a sheet each time they swing to the left when lookingl at Figure 1. The frame 7 and the shoes 5 are carried by the arms. Each time the arms 4 come to rest at the eXtreme right of their swing, the frame 7 is supported by the platform 9 in a position to prevent the shoes from actually putting pressure on the uppermost sheet. Of course, suction is being applied to the shoes at all times by means of the flexible pipes 15 which communicate with a suction pipe 1G. The upper sheets areseparated, from each other by the air iiowing through the air jet 6. There will therefore be a layer of air between the two uppermost sheets, and when the` shoes come in contact with the uppermost sheet, it will not carry the sheet disposed therebeneath. This simple expedient permits only one sheet to be fed to the press at a time.

The weight of the shoes, instead of being carried by the front edges of the uppermost sheets, is carried by the foot 10 which rests upon the stock. This foot is spaced far enough aWay from the front to permit the front edges to be kept separated from each other by the air flowing from the pipe 6.

The device is also adapted to handle envelopes. The distance the shoes go down governs the automatic raising of the pile of paper. As envelopes are soft and fluffy, the shoes bear so heavily upon them that the stack of envelopes keeps on raising clear out ofthe holder. I/Vith my invention the bar 10 takes up the pressure and the envelopes do not come up too high. As the pile lowers, so do the bar 10 and the shoes. Consequently, the automatic lifter (not shown) starts to operate and raises the envelopes and bar 10. With the handling of envelopes, the bar 10 has more surface than the two shoes, consequently the pressure isdistributed over more surface. The invention is very important in both uses. Envelopes cannot be fed at all on the standard Miehle press now.

Although I have shown and described one embodiment of my invention, it is to be understood that the same is susceptible of various changes, and I reserve the right to employ'sueh changes as may come Within the scope of the appended claims.

I claim:

` l. A device of the type described comprisingan arm, a platform carried by one end of said arm, and a foot adjustable on said arm. i

2. A device of the type described comprising'an arm, a platform carried by one end ofsaid arm, and a foot adjustable on said arm, the opposite end of ysaid arm being threaded and carrying a lock nut.

, 3. The combination with a printing press of the vertical type having a stock-carrying feeder table, suction shoes, and arms for moving said shoes to and from said stock, of a stationary arm for supporting said shoes and for spacing them from said stock, and a foot adjustably secured to said arm and bearing against the stock.

4. The combination With a printing press having suction shoes for removing one sheet at a time from the stock, of a stationary arm for supporting said shoes and for spacing them from `the stock, and a member carried by said arm and transversely bearing against the stock, said member being disposed rear- Wardly of said shoes. l

5. The combination with a printing press having a stock-carrying table, suction shoes. and means for moving said shoes to and from the stock, of a stationary arm for supporting said shoes and for spacing them from the stock, and a laterally-extending member earried by saidstationary arm and being adjustable along the length of said arm, said member bearingagainst said stock.

Images