Device for driving a stamping foil, stamping station and machine, and method for controlling the driving of a stamping foil

Patent metadata

Field	Value
Publication number	US-11325408-B2
Application number	US-201817045729-A
Country	US
Kind code	B2
Filing date	Apr 20, 2018
Priority date	Apr 20, 2018
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

A device for driving a stamping foil over a path through a stamping machine is disclosed herein. The driving device comprises two foil-introduction chain-like elements and a drive member coupled to the foil-introduction chain-like elements for driving the foil-introduction chain-like elements notably through a platen press of a stamping machine. The driving device further comprises at least one first load-measurement device comprising a first detector configured to measure a parameter indicative of the load applied by the drive member for driving the foil-introduction chain-like elements in a first direction, the at least one first load-measurement device being connected to a stamping-machine control unit configured to stop the driving by the drive member when the parameter indicative of the load applied by the drive member and measured by the first detector crosses a threshold.

First claim

The invention claimed is:

1. A driving device for driving a stamping foil over a path, the driving device comprising:
two foil-introduction chain-like elements; and
a drive member coupled to the two foil-introduction chain-like elements for driving the two foil-introduction chain-like elements notably through a platen press, wherein the driving device further comprises at least one first load-measurement device, the at least one first load-measurement device including a first detector configured to measure a parameter indicative of a load applied by the drive member for driving the two foil-introduction chain-like elements in a first direction, the at least one first load-measurement device being connected to a control unit configured to stop the driving by the drive member when the parameter indicative of the load applied by the drive member and measured by the first detector crosses a threshold.

2. The driving device of claim 1 , further including a second load-measurement device, the second load-measurement device including a second detector configured to measure a second parameter indicative of the load applied by the drive member for driving the two foil-introduction chain-like elements in a second direction, the second direction being in an opposite direction of the first direction, the second load-measurement device being connected to the control unit configured to stop the driving by the drive member when the second parameter indicative of the load applied by the drive member and measured by the second detector crosses a second threshold.

3. The driving device of claim 2 , wherein the second load-measurement device comprises a second counter-thrust member configured to apply a counter-thrust to the drive member when the two foil-introduction chain-like element are driven in the second direction, the second detector being configured to detect when the counter-thrust applied by the second counter-thrust member crosses a load threshold.

4. A method for controlling driving of a stamping foil, wherein the method is implemented by means of the driving device according to claim 3 , wherein the first load-measurement device comprises a first counter-thrust member configured to apply a counter-thrust to the drive member when the two foil-introduction chain-like element are driven in the first direction, and wherein the first and second counter-thrust members apply a counter-thrust on each side of the drive member with respect to a direction of driving.

5. The method according to claim 4 , wherein the counter-thrust members apply the counter-thrust to the drive member in such a way as to keep the drive member in position.

6. The driving device of claim 1 , wherein the first load-measurement device includes:
a first mobile intermediate transmission element,
a first elastic member that urges the first intermediate transmission element against a foil-introduction chain-like element situated on one side of the drive member and pulled taut when the foil-introduction chain-like element is driven in the first direction, and
a first actuator configured to apply a counter-thrust to the first elastic member when the foil-introduction chain-like element is driven,
the first detector being configured to detect when the counter-thrust applied by the first actuator crosses a load threshold.

7. The driving device of claim 6 , further comprising a second-load measurement device, wherein the second load-measurement device includes:
a second detector configured to measure a second parameter indicative of the load applied by the drive member for driving the two foil-introduction chain-like elements in a second direction, the second direction being in an opposite direction of the first direction;
a second mobile intermediate transmission element,
a second elastic member that urges the second intermediate transmission element against a foil-introduction chain-like element situated on one side of the drive member and pulled taut when the foil-introduction chain-like element is driven in the second direction, and
a second actuator configured to apply a counter-thrust to the second elastic member when the foil-introduction chain-like element is driven,
the second detector being configured to detect when the counter-thrust applied by the second actuator crosses a load threshold.

8. The driving device of claim 7 , wherein the first load-measurement device and/or the second load-measurement device further includes at least one additional intermediate transmission element for guiding the foil-introduction chain-like element through an angle of at least 90°.

9. The driving device of claim 8 , wherein the first mobile intermediate transmission element and/or second mobile intermediate transmission element is interposed between the additional intermediate transmission element and the drive member on the path followed by the stamping foil.

10. A method for controlling driving of a stamping foil, wherein the method is implemented by means of the driving device according to claim 7 , in which
when the foil-introduction chain-like element is driven in the first direction, the first actuator applies a counter-thrust to the first elastic member compression-loaded by a strand of the foil-introduction chain-like element that is pulled taut by the driving of the drive member), the second actuator being inactive, and
when the foil-introduction chain-like element is driven in the second direction, the second actuator applies a counter-thrust to the second elastic member compression-loaded by a strand of the foil-introduction chain-like element that is pulled taut by the driving of the drive member, the first actuator being inactive.

11. The method according to claim 10 , wherein the activated first actuator and the second actuator apply the counter-thrust to the first elastic member and the second elastic member in such a way as to keep the intermediate transmission elements in position.

12. The driving device of claim 1 , wherein the drive member is mounted with the ability to move in a direction of driving of the two foil-introduction chain-like element, the first detector being configured to measure when a movement of the drive member indicative of the load applied by the drive member crosses a threshold.

13. The driving device of claim 12 , wherein the first load-measurement device and/or a second load-measurement device further includes a linear guide on which the drive member is slidably mounted.

14. The driving device of claim 12 , wherein the drive member comprises a driveshaft coupled to the two foil-introduction chain-like elements by a respective universal joint.

15. The driving device of claim 12 , further including two pairs of lower intermediate transmission elements able to move vertically and aligned horizontally to guide each of the two foil-introduction chain-like elements in a horizontal straight line through the platen press.

16. The driving device of claim 1 , wherein the first load-measurement device comprises a first counter-thrust member configured to apply a counter-thrust to the drive member when the two foil-introduction chain-like element are driven in the first direction, the first detector being configured to detect when the counter-thrust applied by the first counter-thrust member crosses a load threshold.

17. A stamping-foil feed and recovery station for stamping elements in sheet form, wherein the stamping-foil feed and recovery station includes the driving device according to claim 1 .

18. A machine for stamping elements in sheet form, wherein the machine includes a

Assignees

• Bobst Mex Sa

Inventors

• Jaquet Bernard
• De Gaillande Christophe
• Song Haoming

Classifications

• B41P2219/42

  Sheet-like material · CPC title

• B41M1/24

  combined with embossing (printing machines for carrying out printing operations combined with embossing B41F19/02) · CPC title

• B41K3/62

  Details or accessories · CPC title

• B41F16/006

  Arrangements for moving, supporting or positioning the printing foil or band · CPC title

• B41K3/64 Primary

  Stamping mechanisms controlled by feed of copy matter · CPC title