# US 7,744,518 B2 · Folder having a retractable covering cam for changing operating mode

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- Number: US 7,744,518 B2
- Document ID: US7744518B2
- Status: Granted
- Kind: B2
- Application number: 11/895,957
- Filed: 2007-08-28
- Published: 2008-03-13
- Granted: 2010-06-29
- Earliest claimed: 2006-08-28
- Assignees: Goss Systemes Graphiques Nantes
- Inventors: Cyrille Belleculee; Michel Griffon
- Web page: https://patentgrep.com/patent/US7744518B2

## CPC

- B65H 45/168: {having changeable mode of operation}
- B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES

## Abstract

This folder includes a device for cutting sheets from a web of paper, a folding cylinder which is provided with movable retention devices and movable blades for folding the sheets cut from the web, a cam for controlling the movement of the movable retention devices by contact with cam followers, a cam for controlling the movement of the tucking blades by contact with cam followers, and at least one covering cam. The covering cam includes two semi-cams which can each be moved radially between a retracted position and an extracted position, the covering cam being in a configuration for straight operation when the semi-cams are in a retracted position and in a configuration for collect operation when the semi-cams are in an extracted position.

## Claims

### Claim 1

A folder for cutting and folding a web of paper comprising:
a cutting device for cutting sheets from the web;
a folding cylinder including movable retention devices and movable tucking blades for folding the sheets cut from the web, the cylinder being rotatably moved about an axis thereof;
a first control cam for controlling the movement of the movable retention devices by contact with first cam followers;
a second control cam for controlling the movement of the tucking blades by contact with second cam followers;
at least one covering cam having a configuration for collect operation, the covering cam inhibiting at least one of the first and second control cams, and a configuration for straight operation where the covering cam does not inhibit the first and second control cams; and
a switch for controlling the covering cam and a device for moving the switch between a radially remote position in which the switch guides an element carried by the covering cam radially outwards so the covering cam moves into the configuration for collect operation, and a close position in which the switch guides the element radially inwards so the covering cam moves into the configuration for straight operation;
the covering cam including two semi-cams being substantially mutually symmetrical relative to the axis of the folding cylinder and radially movable between a retracted position and an extended position,
the covering cam being in the configuration for straight operation when the semi-cams are in the retracted position and in a configuration for collect operation when the semi-cams are in the extended position.

### Claim 2

The folder as recited in 1 wherein the covering cam neutralizes zones of the first control cam and zones of the second control cam.

### Claim 3

The folder as recited in 1 wherein the configurations for collect operation and straight operation are mechanically stable.

### Claim 4 (depends on 3)

The folder as recited in claim 3 wherein the covering cam includes at least one toggle joint mechanism moving via an aligned position when moving from the configuration for collect operation to the configuration for straight operation.

### Claim 5 (depends on 4)

The folder as recited in claim 4 wherein the covering cam includes a hub on which the two semi-cams are articulated, each semi-cam being further connected to the hub via the toggle joint mechanism.

### Claim 6 (depends on 1)

The folder as recited in claim 1 wherein the covering cam includes at least one return device for returning each semi-cam to the extended position.

### Claim 7 (depends on 6)

The folder as recited in claim 6 wherein the return device is a gas spring.

### Claim 8 (depends on 1)

The folder as recited in claim 1 further comprising two rollers co-operating with the tucking blades of the folding cylinder.

### Claim 9 (depends on 1)

The folder as recited in claim 1 further comprising a jaw cylinder co-operating with the tucking blades of the folding cylinder.