US2220046A - Sheet feeding device - Google Patents

Sheet feeding device Download PDF

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Publication number
US2220046A
US2220046A US26908239A US2220046A US 2220046 A US2220046 A US 2220046A US 26908239 A US26908239 A US 26908239A US 2220046 A US2220046 A US 2220046A
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Prior art keywords
sheet
device
member
gripper
out
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Expired - Lifetime
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Lang Karl Theodor
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Lang Karl Theodor
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F21/00Devices for conveying sheets through printing apparatus or machines
    • B41F21/04Grippers
    • B41F21/05In-feed grippers

Description

.Oct. 29. '1940.

k. T. LANG 2,220,046

SHEET FEEDING DEVICE Filed April 21, 1939 5 Sheets-Sheet 1 Oct. 29, 1940. K. T. LANG SHEET FEEDING DEVICE Filed A rii 21, 19:9 5 Sheets-Sheet 2 Oct. 29, '1940. 1', LANG I 2,220,046

SHEET FEEDING DEVICE Filed April 21, 1939 5 Sheqts-Sheet 3 "Jnuenior Oct. 29, 1940. K. T. LANG 2,220,046

SHEET FEEDING DEVICE Filed April 21, 1939 5 Sheets-Sheet 4 I III i y s5 68 5 Jnvemor: HM WM @24 Oct? 9, 1940- r K. T. LANG 2,220,046

' SHEET FEEDING DEVICE Fil ed April 21, 19:59 7 5 Sheets-Sheet 5 desired operating speed.

Patented Oct. 29, 1940 UNITED. STATES SHEET FEEDING DEVICE Karl Theodor Lang, Radebeul, Germany Application April 21, 1939, Serial No. 269,082

In-Germany December 10, 1938 Claims. (Cl. 271-53) I This invention relates to a device for insuring accurate feeding of the sheets of a sheet printing machine with respect to the gauges of the feed table.

' In some of the known devices of this class the sheets caught by the grippers of a rotary sheet feeder are moved awayfroin the pivot of the rotating feeder by special guides and are withdrawn from the feed table at a speed greater than the circumferential speed of'the sheet feeder. The sheet guides comprise for instance toggle levers which cooperate in the rotary motion of the sheet feeder and are controlled by a stationary cam that have to be separately controlled and curves involve a restriction to certain speeds only.

Compared with the known art,- the invention overcomes the drawbacks mentioned by employing as sheet guide a sheet carrying drum or the surface line of the cylinder, which drum rotates about a pivot eccentricallydisposed relative to the center of the path of the grippers. The sheet carrying drum and the grippers are connected by suitable means. as a crank guide, to provide for equal rotary motion. In this way, only rotary elements are provided, and it is evident that two concentrically rotating members admit of any It is advantageous to render adjustable the eccentricity between the center of the path of the grippers and that of the sheet carrying drum.

The sheet carrying drum is preferably eccentrically arranged on the shaft of the supports for the grippers, and this shaft is connected with the drum by a coupling permitting radial motion and insuring rotary motion.

In further accordance with the invention an additional increase in speed can be attained by providing besides the sheet guideor press-out member connecting with the preliminary grippers another such member preferably constructed like the first one, both guides or members being guided parallel yet oppositely in their eccentricity. By

varying the relative eccentricity the speed at which sheets are withdrawn can be regulated.

The invention is illustrated by way of example in the accompanying drawings, in which Figures 1, 2 and 3 are side views of the device at different operating positions;

. displaced during rotation.

Fig. 4 is a longitudinal section of the shaft of the gripper carriers, and

Figs. 5 to 7 are side views of a modification, operating with several sheet guides or press-out members, at diiferent working positions.

More particularly:

Figure 1 shows the device at the moment when the sheet is passing from the feed table to the preliminary grippers;

Fig. 2 shows the device when a sheet is'transl0 ferred to the feeding means according to the invention;

Fig. 3 shows the position after the sheet has been. transmitted to the impression cylinder.

The sheets I are placed in known manner on the feed table 2 and passed by the preliminary grippers 3 to the feeding device according to the invention. 4 designates the impression cylinder provided with the grippers 5.

The device according to the invention substantially comprises two parts. One of these parts is represented by'the grippers 6 for the sheets. The grippersfi are arranged on the carriers 1 and rotate about a shaft 8 in a circular path "9. The shaft 8 is rotatably disposed in the machine frame In. If only the grippers 6 were provided the sheets would be moved over their entire length in a circular path.

The second part of the device according to the invention is, however, a sheet carrying drum Ii eccentrically positioned on the shaft 8 of the gripper carriers 1 and having for instance the shape shown. The center of rotation of the drum II is located at l2; and the eccentricity between the shafts 8 and. I2 is designated as.

To enable the drum H to cooperate in the rotary motions of the grippers 6 both the grippers 6 and the drum II are connected by suitable means, as a crank guide l3, l4, the pin l3 being positioned on the carrier 1 and the drum ll having a 7 slot guide H in which the pin l3 can be radially The eccentricity a: between the center 8 of the path of the grippers and the center l2 of the drum l I is preferably adjustable.

The device operates as follows:

When the shaft 8 is driven it drives also the grippers 6 in the direction of rotation shown in Figs. 1 to 3. In the position shown in Fig. 2 the sheet I ispressed out radially by the sheet carrying drum I I, so that the acceleration of the rear end of the sheet will be equal to double the eccentricity or 22:. This involves the advantage that the sheets can be fed again more rapidly to the table 2. Tests have shown that the device operates at a very high speed. I

In the modified device shown in Figs. 5 to 7 the gripper 6 arranged below the preliminary gripper moves in the direction of the arrow shown in the circular path A, 13 indicating the path of the preliminary gripper. Eccentrically to the shaft 3 the press-out member or sheet guide is arranged which is rotatable about the pivot I2 and substan= tially comprises a cylindrical surface II formed so that at its running-on end it is tangent to the circular path B when the sheet is being transferred. The press-out member II possesses a link-guide 28 in which a roll 29 rotatably disposed on the gripper 6 moves. When the gripper 6 rotates in the direction of the arrow the pressout member II is moved also by means of the roll 29 and the link 28.

Below the press-out member I! an additional conveying gripper 3| is positioned on a shaft 30 for guiding the sheet on the circular path C, the gripper 3| rotating in a direction opposite tothat of the gripper 6. Parallel thereto, but oppositely .eccentrically, a second press out member is formed at 32 on the superficies 33 of a cylinder. The circular paths A, B, C are tangent to each other. The press-out member or sheet guide 33 is driven again by a link-guide 34 and a roll 35 disposed on the gripper 3|. The circular path C is tangent also to the path of motion, not shown, of the grippers of the printing cylinder 5 which rotates in a direction opposite to that of the gripper 3i. Brushes 31, 38 and'39, which may be replaced of course by blasts, etc., smooth the sheet i during operation.

The device shown in Figs. 5 to 7 functions as follows:

In the position shown in Fig. 5 the preliminary gripper 3 receives the sheet I from the table 2, the gripper 6 being in a position immediately preceding taking over. In the position shown in Fig. 6 the sheet I is taken by the gripper 6 from the preliminary gripper 3 and withdrawn further, the press-out member or sheet guide II cooperating in the rotary motion. Owing to its eccentric position and its form, the member II extends during its rotation with a portion of the circumference of the cylindrical surface beyond the range of the circular path A, whereby quicker withdrawal of the sheet I from the table 2 is effected. After a rotation of approximately from the point of transition the sheet I is delivered by the gripper 6 to the gripper 3i rotating in opposite direction. During the rotation of the gripper 3| the press-out member or sheet guide 33 acts in a similar manner as the member II aaaogo ie -the sheets of a sheet printing machine with respect to the gauges of the feed table, in which the sheets caught by rotating grippers are pressed out of the path of the grippers by special means to accelerate the rear end of the sheets, characterized in that the press-out member is a sheet carrying drum or a portion of a cylindrical surface rotating about a center eccentrically located relative to the center of the path of the grippers, and that the grippers and the sheet carrying drum are connected by suitable means, as a crank guide, to insure uniform rotary motion, said guide being in the head members of the press out drum.

2. A device according to claim 1, in which the degree of eccentricity between the center of the path of the grippers and that of the sheet carrying drum is adjustable.

3. A device according to claim 1, in which the sheet carrying drum is eccentrically arranged on the shaft of the gripper carriers and said shaft is connected with said drum by'a coupling permit tingradial motion and enforcing rotary motion.

4. A device according to claim 1, in which the press-out member connecting with the preliminary, gripper connects with a second sheet pressout member.

5. A device according to claim 1, in which the press-out member connecting with the preliminary gripper connects with a second sheet pressout member which is of the same or similar type as the first press-out member.

6. A device according to claim 1, in which the press-out member connecting with the preliminary gripper connects with a second sheet pressout member of the same or similar type as the first press-out member and the said two members, with respect to eccentricity, are preferably directed parallel but oppositely so.

7. A device according to claim 1, in which the running-on surface of the press-out member having the form of the superficies of a cylinder is tangent to the path of the front edge of the sheet determined by the conveying grippers.

8. A device according to claim 1, in which the press-out member connecting with the preliminary gripper connects with a second sheet pressout member of the same or similar type as the r air means, are associated with the press-out members. I

9. A device according to claim 1, .in which a plurality of press-out members are arranged one after the other, the number and dimensions thereof depending upon the length of the sheets.

10. A device according to claim 1-, in which a plurality of press-out members are arranged one after the other, the number and v dimensions thereof depending upon the length of the sheets, and the eccentricities of said members are variable relative to one another.

KARL THEODOR LANG.

US2220046A 1938-12-10 1939-04-21 Sheet feeding device Expired - Lifetime US2220046A (en)

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DE2220046X 1938-12-10

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190645A (en) * 1961-01-28 1965-06-22 Maschf Augsburg Nuernberg Ag Sheet-feeding device for printing presses
US4967656A (en) * 1989-06-21 1990-11-06 Printing Research, Inc. Eccentric cylinder for sheet-fed rotary printing presses
EP0709186A1 (en) * 1994-10-29 1996-05-01 MAN Roland Druckmaschinen AG In-feed gripper for rotary sheet printing machines
DE10332213B3 (en) * 2003-07-16 2004-08-19 Koenig & Bauer Ag Sheet printing machine has air casing used for movement of sheet between transfer point from sheet transfer roller and printing gap between ink cylinders
US6886690B2 (en) 1999-07-29 2005-05-03 The Gillette Company Container for shaving cartridge or other stored item
US7159324B2 (en) 1999-07-29 2007-01-09 The Gillette Company Storage device for shaving razor, cartridges, or other stored items

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190645A (en) * 1961-01-28 1965-06-22 Maschf Augsburg Nuernberg Ag Sheet-feeding device for printing presses
US4967656A (en) * 1989-06-21 1990-11-06 Printing Research, Inc. Eccentric cylinder for sheet-fed rotary printing presses
EP0709186A1 (en) * 1994-10-29 1996-05-01 MAN Roland Druckmaschinen AG In-feed gripper for rotary sheet printing machines
US6886690B2 (en) 1999-07-29 2005-05-03 The Gillette Company Container for shaving cartridge or other stored item
US20050183971A1 (en) * 1999-07-29 2005-08-25 The Gillette Company Container for shaving cartridge or other stored item
US7159324B2 (en) 1999-07-29 2007-01-09 The Gillette Company Storage device for shaving razor, cartridges, or other stored items
US7631757B2 (en) 1999-07-29 2009-12-15 The Gillette Company Container for shaving cartridge or other stored item
DE10332213B3 (en) * 2003-07-16 2004-08-19 Koenig & Bauer Ag Sheet printing machine has air casing used for movement of sheet between transfer point from sheet transfer roller and printing gap between ink cylinders

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