IP Library › Granted Patent US 7,444,933
Granted Patent B2
US 7,444,933 · App. 10/898,331 · Granted Nov 4, 2008

Stencil printer

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Quick Facts
Patent No.
US 7,444,933
App. No.
10/898,331
Granted
Nov 4, 2008
Kind
B2
Abstract

A stencil printer of the present invention perforates, or cuts, a thermosensitive stencil with a thermal head to thereby make a master. The stencil printer includes a stencil distinguishing device for automatically identifying the kind of the stencil or a master setting device for allowing the operator of the printer to set the kind of the stencil. An adjusting device selects, among master making conditions experimentally determined beforehand, a master making condition matching with information output from the stencil distinguishing device or the stencil setting device. The operator can easily change the master making condition in accordance with the kind of a stencil to use.

Claims (48)

1. A stencil printer for perforating a thermosensitive stencil with heating means to thereby make a master, said stencil printer comprising:

a platen roller for conveying the stencil, said platen roller facing the heating means;

stencil setting means for allowing an operator of said stencil printer to set a kind of the stencil using an input/output device, said kind of the stencil includes information regarding a perforation sensitivity of the stencil; and

adjusting means for selecting, among master making conditions experimentally determined beforehand, a master making condition matching with information output from said stencil setting means, wherein said adjusting means adjusts a master making speed of the platen roller in accordance with said information, and wherein when the perforation sensitivity of the stencil is low, data indicative of a low master making speed is selected, and when the perforation sensitivity is standard, data indicative of a standard master making speed is selected.

2. The stencil printer as claimed in claim 1 , wherein said adjusting means adjusts, based on said information, a speed at which the stencil is conveyed.

3. The stencil printer as claimed in claim 1 , wherein said heating means comprises a thermal head.

4. The stencil printer as claimed in claim 1 , wherein said heating means comprises a thermal head,

a platen pressure for pressing the stencil against said thermal head is adjustable, and

said adjusting means adjusts the platen pressure in accordance with said information.

5. The stencil printer as claimed in claim 1 , wherein said heating means comprises a thermal head,

said stencil printer further comprises a feed roller pair located downstream of said platen roller in a direction of stencil conveyance for adjusting a front tension of said stencil, and

said adjusting means adjusts the front tension in accordance with said information.

6. The stencil printer as claimed in claim 1 , wherein said heating means comprises a thermal head,

said stencil printer further comprises a feed roller pair located upstream of said platen roller in a direction of stencil conveyance for adjusting a back tension of said stencil, and

said adjusting means adjusts the back tension in accordance with said information.

7. The stencil printer as claimed in claim 1 , wherein said heating means comprises a thermal head, and

said adjusting means adjusts energy to be applied to said thermal head in accordance with said information.

8. The stencil printer as claimed in claim 1 , wherein said heating means comprises a thermal head,

said stencil printer further comprises temperature sensing means for sensing a temperature of said thermal head, and

said adjusting means adjusts energy to be applied to said thermal head in accordance with said information and information output from said temperature sensing means.

9. The stencil printer as claimed in claim 1 , wherein said input/output device comprises:

an LCD (Liquid Crystal Display) positioned on an operation panel, which is mounted on a printer body, for displaying the kind of the stencil; and

keys arranged on said operation panel for allowing the operator to set the kind of the stencil.

10. The stencil printer as claimed in claim 1 , wherein said input/output device comprises a host connected to said stencil printer.

11. A stencil printer for perforating a thermosensitive stencil with a heating device to thereby make a master, said stencil printer comprising:

a platen roller configured to convey the stencil, said platen roller facing the heating device;

a stencil setting device configured to allow an operator of said stencil printer to set a kind of the stencil using an input/output device, said kind of the stencil includes information regarding a perforation sensitivity of the stencil; and

an adjusting device configured to select, among master making conditions experimentally determined beforehand, a master making condition matching with information output from said stencil setting device, wherein said adjusting device adjusts a master making speed of the platen in accordance with said information, and wherein when the perforation sensitivity of the stencil is low, data indicative of a low master making speed is selected, and when the perforation sensitivity is standard, data indicative of a standard master making speed is selected.

12. The stencil printer as claimed in claim 11 , wherein said adjusting device adjusts, based on said information, a speed at which the stencil is conveyed.

13. The stencil printer as claimed in claim 11 , wherein said heating device comprises a thermal head.

14. The stencil printer as claimed in claim 11 , wherein said heating device comprises a thermal head,

a platen pressure for pressing the stencil against said thermal head is adjustable, and

said adjusting device adjusts the platen pressure in accordance with said information.

15. The stencil printer as claimed in claim 11 , wherein said heating device comprises a thermal head,

said stencil printer further comprises a feed roller pair located downstream of said platen roller in a direction of stencil conveyance for adjusting a front tension of said stencil, and

said adjusting device adjusts the front tension in accordance with said information.

16. The stencil printer as claimed in claim 11 , wherein said heating device comprises a thermal head,

said stencil printer further comprises a feed roller pair located upstream of said platen roller in a direction of stencil conveyance for adjusting a back tension of said stencil, and

said adjusting device adjusts the back tension in accordance with said information.

17. The stencil printer as claimed in claim 11 , wherein said heating device comprises a thermal head, and

said adjusting device adjusts energy to be applied to said thermal head in accordance with said information.

18. The stencil printer as claimed in claim 11 , wherein said heating device comprises a thermal head,

said stencil printer further comprises a temperature sensor responsive to a temperature of said thermal head, and

said adjusting device adjusts energy to be applied to said thermal head in accordance with said information and information output from said temperature sensor.

19. The stencil printer as claimed in claim 11 , wherein said input/output device comprises:

an LCD positioned on an operation panel, which is mounted on a printer body, for displaying the kind of the stencil; and

keys arranged on said operation panel for allowing the operator to set the kind of the stencil.

20. The stencil printer as claimed in claim 11 , wherein said input/output device comprises a host connected to said stencil printer.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 15, 2013
From: TOHOKU RICOH CO., LTD.
To: RICOH COMPANY, LTD.
Reel/Frame 030218/0781 →