US1133807A - Suction device for automatic printing-presses and similar machines. - Google Patents

Description

A. LAGERMAN, JR., & (in. LIfibQTRUM. SUCTION DEVICE FOR AUTOMATIC PRINTING PRESSES AND SIMILAR MACHINES.

AIPLICATION FILED JULY 24, 1913. 1,133,807. Patented Mar. 30, 1915..

nnirnn rarsrarnivrorricn .ennxnnnnn. Lasnnivmn, m, or VILLA. ALEXANDRA, LERUM, AND ensrnr HJALIMAR LINDSTRGDL 0F GQTTENBORG, SWEDEN 0F GO'ITENBOR-G, SWEDEN, A CQRPORA ASSIGNORS TO AKTIEBOLAGETPRINCEPS, TION OF SWEDEN.

SUCTION DEVICE .FGR AUTOMATIC PRINTING-PRESSES AND SIMILAR MACHINES.

To all wizom it may concern:

MAN, Jr., a subject of the King of Sweden, and resident of Villa Alexandra, Lerum, in the Kingdom of Sweden, and GUsTAF HJAL- MAR LINnsTRoM, a subject of the King of Sweden, and resident of Berzeliigatan No. 9, Gottenborg, in the Kingdom of Sweden, have invented certain new and useful Improvements in Suction Devices for Automatic Printing-Presses and Similar Ma chines, of which the following is a specification, reference heing had therein to the accompanying drawing.

This invention relates to an improvement inthe suction device provided in printing presses, especially platen printing presses, for the feeding of the paper. As before known, the suction device consists of a suction pipe, located above the feed-table and extending along its front edge, which suction pipe is provided with a plurality of mouth-pieces extending downward toward the top side of the pile of paper sheets, by means of which moutlnpieces the front edge of the top paper sheet is sucked upward, so that the said edge will have a free position and a gripping and transporting device can seize the said sheet and move the same to the platen. The machine is so constructed that the sheets of two piles located abreast on the parts respectively of the bipartite feed-table can be printed simultaneously. For adapting the suction to the stiffness, thickness and so on of the paper sheets the said mouth-pieces are adjustable, for which purpose each of the mouth-pieces is fixed to a sleeve rotatably mounted on the suction pipe, so that by rotating the said sleeve the air passage is opened or closed to a. greater or less extent. Besides the said pipe as a whole can be adjusted by rotating the same around an axis parallel to the longi tudinal axis of the pipe, so that the slanting position of the mouth-pieces with relation to the top side of the paper pile is changed. However, it is desirable to control the suction operation in a more convenient man- Specification of Letters Patent.

Application filed July 24, 1913.

Serial No. 780,981.

. ner than by shifting successively the mouth- Be it known that we, ALEXANDER LAGER? pieces, viz. to control the suction operation for each paper pile separately according to the nature of the paper by a single manipulation. This is effected by the present invention and for that purpose the suction pipe is divided into sections and its suction openings made adjustable by sets in each section. Furthermore the said sections are so arranged, that they can be swung individually around an axis parallel to the axis of the pipe, and are at their adjacent ends provided with connecting devices, so that the sections can be swung simultaneously.

In the accompanying drawing Figure 1 shows a part of the frame of the machine and the suction pipe viewed toward one end of the machine. Fig. 2 is a side view of the suction pipe and Fig. 3 is a cross section of the pipe on the line a to Z) of Fig. 2. Figs. 4 and 5 show details.

The suction pipe 1 is divided transversely at its center into two parts, one part comprising an inner pipe 2 and anouter pipe 3 slid on the pipe 2. Sleeves 4, l carrying the mouth-pieces 5, 5 respectively are slid on the pipe 3. The other part of the pipe 1 comprises in the same manner the pipes 52*, 3* and the sleeves a 4% with the n1outh-pieces 5-", 5 The pipe is provided at its outer ends with downward exnecting the sections of the pipe comprises the disks 8, 8, which are fixed to the adjacent ends of the sections of the pipe. The surfaces of the said disks facing each other fit snugly one to the other and the disks can be connected by a jam screw 9, which is in Patented Mar. 3%. i915.

screw-throaded engagement with one of the disksand passes through a slot 10 provided in the other disk. A cam piece 11 provided on one of the disks engages a groove 12 provided in the other disk. The said campiece and groove and the slot 10 are curved shaped with the point 7 as center point and serve as a guide. After the screw 9 has been untightened the parts 2 to 5 inclusive and 2* to 5 inclusive of the pipe can easily be rotated one with relation to the other, so that the mouth-pieces can be shifted into the proper position with relation to the piles respectively, as stated above. The width of the.pipe is so great and the said rotary motion is so limited, that the suction is not interrupted by the said rotation. For the rotating of the pipe as a whole and locking the same links 13 and a locking device 14 are provided. A hose connects the right end of the pipe, Fig. 2, and the suction pump, not shown. The suction openings 15,- 16 provided in the pipes 52 and 3 at the mouth-pieces are shown in Fig. 3. The inner pipe can be rotated inside the outer pipe by means of the handle 17, which extends through a slot provided in By rotating the inner pipe the openings 15, 16 are opened or closed to greater or less extent, so that the suction, efiected by the mouth-pieces 5, 5 and 5*, 5 .,is adjusted at all the mouth-pieces of each set simultaneously. Consequently, if for instance the paper sheets in the left pile, located below the mouth-pieces 5, 5 are thinner than thepaper sheets of the other pile located below the mouth pieces 5", 5" the mouth-pieces first mentioned are closed to a greater extent than the latter by shifting the corresponding handle 17 correspondingly. As already stated the mouth pieces may be rotated individually. This swinging movement of the mouth pieces individually is effected manually. One simply seizes one of the sleeves 4, 4B and swings it around the tube 1. The sleeves fit tightly around the tube 1 on account of the friction, and for this reason no special locking device is needed. However, pins 19 areused for limiting the rotary motion. Owing to this arrangement the mouth pieces can be adjusted as desired and independently of the adjustment first mentioned, and such mouth pieces may be shut ofl", as are not necessary for the feeding of the sheets, dependent on the greater or less width of the sheets. In Fig. 3 one of the mouth pieces is shut off. Recesses 18 in the sleeves 4, 4* and pins 19 limit the rotary motion mentioned above.

From the above description it will be seen that the inner pipe forms a revolving damper for the adjusting of the suction effected by a plurality of mouth-pieces of one set, while the suction effected by the mouth pieces of another set remains unaltered.

The device described above may easily be modified. For instance one of the pipes (the inner pipe) may be movable longituthe outer pipe.

'dinally with relation to the other pipe, the

main thing being, that the desired adjustment can easily be effected for each of the piles of paper sheets and for successive kinds of paper in the same pile without changing the position of the, mouth-pieces proper. The tables on which the piles are located, are moved upward and downward for a short distance in order that the top side of the pile during the upward stroke may be brought into the vicinity of the mouth pieces or touch the same. In order that the pile may without any shock, the holes provided for the pins 7, 7 are oval, so that the suction pipe can be raised for some distance from the table. Tension springs 20 fixed to the lowerside of the pipe and to the frame return the pipe to its initial position, as the table is lowered. Owing to the said arrangement the pressure of the mouth-pieces against the paper never becomes greater than is necessary. Two pipes one slid into touch the mouth-pieces the other for the purpose mentioned above may be used also when the suction pipe is in.

one piece a. 0. when the pipe is not divided transversely into two or more sections. The invention may be applied also to folding machines, ruling machines and so on.

Having now described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In a suction device for automatic printing presses and similar machines, the combination of a suction pipe provided with sets of suction openings, and means for adjusting the suction openings of each set simultaneously and independently of the other set, substantially as described and for the purpose set forth.

2. In a suction device for automatic printing presses and similar machines, the

'for swinging the sections individually around an axis parallel to the axis of the pipe, and means for connecting the sections, substantially as described and for the purpose set forth.

4. In a suction device for automatic printing presses and similar machines, the combination of a suction pipe provided signed our subscribing witnesses.

names in the presence of two ALEXANDER LAGERMAN, JR.

GUSTAF m ALMAR LINDsTniin.

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