Method and device for combining an auxiliary stack and a main stack, sheet-fed printing press or sheet punching machine and method for driving an auxiliary stack carrier

Patent metadata

Field	Value
Publication number	US-9533845-B2
Application number	US-201514856779-A
Country	US
Kind code	B2
Filing date	Sep 17, 2015
Priority date	Sep 17, 2014
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A method and a device for combining an auxiliary stack and a main stack include a rake carrying the auxiliary stack and being abruptly movable out of a stack area to prevent sheets that contact the rake from being entrained and to preserve the structure of the stack. A sheet-fed printing press or sheet punching machine having the device is also provided.

First claim

The invention claimed is:

1. A device for combining an auxiliary stack with a main stack in a stack area, the device comprising:
an auxiliary stack carrier supporting the auxiliary stack;
a drive pulling said auxiliary stack carrier out of the stack area; and
a jolting unit abruptly accelerating the pulling of said auxiliary stack carrier out of the stack area.

2. The device according to claim 1 , wherein said auxiliary stack carrier is a rake having a plurality of rake prongs disposed adjacent one another and spaced apart from one another.

3. The device according to claim 1 , wherein said jolting unit includes a stop and a mass being movable against said stop.

4. The device according to claim 3 , wherein said mass is pneumatically drivable.

5. The device according to claim 1 , wherein said jolting unit includes a profile disposed in a circular shape and a mass being drivable to rotate and to roll under a pre-load on said profile.

6. The device according to claim 5 , which further comprises a drive motor rotating said mass.

7. The device according to claim 1 , wherein said jolting unit has a housing and is disposed between said drive for said auxiliary stack carrier and said auxiliary stack carrier.

8. A sheet-fed printing press or sheet-fed die-cutting or stamping machine, comprising a device according to claim 1 .

9. A method for driving an auxiliary stack carrier as the auxiliary stack carrier is pulled out of a stack area to combine an auxiliary stack and a main stack, the method comprising the following steps:
imparting a jolt to the auxiliary stack carrier by using a pneumatically drivable jolting unit;
abruptly accelerating the auxiliary stack carrier due to the jolt; and
subsequently moving the auxiliary stack carrier out of the stack area at a constant speed by using a drive.

10. A method for driving an auxiliary stack carrier as the auxiliary stack carrier is pulled out of a stack area to combine an auxiliary stack and a main stack, the method comprising the following steps:
imparting successive sudden movements to the auxiliary stack carrier at regular intervals by using an electromechanically drivable jolting unit;
accelerating the auxiliary stack carrier in a jerky manner due to the sudden movements as the auxiliary stack carrier is being pulled out of the stack area; and

moving the auxiliary stack carrier out of the stack area by using a drive.

Assignees

• Heidelberger Druckmasch Ag

Inventors

• Mueller Andreas
• Grasmueck Georg
• Haeussler Manfred
• Kloss Jens
• Wolf Burkhard
• Schubert Johannes

Classifications

• B65H2801/21

  Industrial-size printers, e.g. rotary printing press · CPC title

• B65H2601/252

  Collapsing, e.g. of piles · CPC title

• B65H2301/42256

  Pallets; Skids; Platforms with feet, i.e. handled together with the stack · CPC title

• B65H1/263 Primary

  Auxiliary supports for keeping the pile in the separation process during introduction of a new pile · CPC title

• B65H2403/00

  Power transmission; Driving means · CPC title