Hot stamping printing device

Patent metadata

Field	Value
Publication number	US-9027473-B2
Application number	US-201013516276-A
Country	US
Kind code	B2
Filing date	Dec 3, 2010
Priority date	Dec 18, 2009
Publication date	May 12, 2015
Grant date	May 12, 2015

Abstract

A printing device 300 for printing elements in the form of sheets 10, includes a platen press 310 which hot stamps to affix to each sheet 10 with a colored or metallized film from at least one stamping strip 320. A transport device 340 introduces each sheet 10 one after the other into the platen press 310 by pulling the sheet 10 by its front edge. The printing device 300 further includes a device 360 able to partially restrain each sheet 10 by its rear portion during the phase of introducing the sheet 10 into the platen press 310.

First claim

The invention claim is:

1. A printing device for printing sheet elements, the printing device comprising:
a platen press configured and operable for hot stamping to affix to each sheet element colored or metallized film from at least one stamping strip;
a transport device configured and operable to introduce, during a phase of introducing, each sheet element one after the other into the platen press by pulling the sheet element by a front edge thereof; and
a restraining device comprising a suction member including a restraining surface and a suction orifice located in the restraining surface, the suction member being positioned substantially adjacent the platen press and operable to urge a trailing portion of the sheet element against the restraining surface, such that as the sheet element is fed into the platen press as it moves with a sliding contact against the restraining surface and is thereby partially restrained substantially throughout the phase of introducing the sheet element into the platen press;
a fluid flow channel comprising an inlet end and an outlet end, and configured to lead pressurized air; and
the suction orifice having a first end opening onto a face of the restraining surface and a second end in fluid communication with the fluid flow channel at a position between the inlet end and the outlet end of the fluid flow channel so as to generate a low pressure region between the first and second ends of the suction orifice.

2. The printing device according to claim 1 , wherein the restraining device holds the rear portion of each sheet element generally in a plane of travel of the front edge of the sheet element during the phase of introducing the sheet element into the platen press.

3. The printing device according to claim 1 , wherein the suction member is positioned upstream of the platen press in the introduction direction, and the suction member collaborates through sliding contact with the rear portion of each sheet element at least as the sheet element is being introduced into the platen press.

4. The printing device according to claim 3 , wherein the suction member acts over approximately an entire width across each sheet element as the sheet element is introduced into the platen press.

5. The printing device according to claim 1 , wherein the suction member is fixed and is positioned at the path followed by the front edge of each sheet element just before the sheet element is introduced into the platen press.

6. The printing device according to claim 1 , wherein the suction member is mounted in the device to move between an active position in which the suction member is positioned close to a path followed by the front edge of each sheet element just before the front edge of the sheet element is introduced into the platen press, and a passive position in which the sheet element is positioned a distance away from the path;
the printing device comprises a moving device configured and operable for moving the suction member from the passive position into the active position when the sheet element is in a position ready to be introduced into the platen press and, conversely, to move the suction member from the active position into the passive position when the sheet element is extracted from the platen press after passing the platen press.

7. The printing device according to claim 1 , wherein one of the platens is operable to provide hot stamping such that the hot stamping of each sheet element is performed on a printing face of the sheet element, and the suction member is positioned on an opposite side of the sheet element from the printing face as the sheet element approaches the platen press.

8. The printing device according to claim 1 , wherein the suction member operates continuously.

9. The printing device according to claim 1 , wherein the suction member operates discontinuously, and the suction member is activated as the front edge of a sheet element arrives plumb with the suction member, and the suction member is deactivated as the trailing rear of the sheet is no longer in contact with the suction member.

10. The printing device according to claim 1 , wherein the suction member is of Bernoulli type.

11. The printing device according to claim 1 , wherein the suction member comprises a tablet, and a main pressurized air supply channel extends longitudinally through the tablet;
at least one secondary channel to which the main air supply channel communicates, the at least one secondary channel runs transversely of the tablet and opens to a rear of the tablet via an individual discharge orifice,
a suction orifice with which each secondary channel communicates, the suction orifice opens onto a face of the tablet that is intended to come into contact with each sheet element that is being introduced into the platen press, and each secondary channel has a restriction positioned just upstream of the suction orifice.

12. The printing device according to claim 11 , wherein each discharge orifice is oriented in opposition in relation to the platen press, and in relation to a plane of travel of each sheet element as the sheet element approaches the platen press.

13. The printing device according to claim 11 , wherein each suction orifice has a conical shape opening out toward the outside in a region of a portion of the suction orifice closest to the platen press.

14. A processing machine for processing sheet elements, the machine comprising at least one printing device according to claim 1 .

Assignees

• Fornay Jean-François
• Bobst Mex Sa

Inventors

• Fornay Jean-François

Classifications

• B41F19/06 Primary

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• B65H29/686

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• B41P2219/00

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