Stamp apparatus

Details Stamp apparatus Stamp apparatus

1993-10-19

1995-12-19

Burr, Edgar S.

Printing

Stenciling

1011271, B41F 1500

Patent

active

054760380

ABSTRACT:
A stamp apparatus prevents a used stencil plate from being used again for making a plate. The apparatus includes a reflective photo sensor that determines if thermal paper of the currently set stencil plate is colored from a past plate-making process. On detecting the colored thermal paper, the sensor prompts an LCD to give an alarm display warning the user of the used stencil plate. Alternatively, a retractable projection interferes with insertion of a used stencil plate. In both cases, the stamp apparatus remains disabled until the used stencil plate is removed. This protects the stamp apparatus from getting soiled or damaged by spilled ink from the used stencil plate set inadvertently by the user.

REFERENCES:
patent: 3585928 (1971-06-01), Kaneko
patent: 4628813 (1986-12-01), Hasegawa et al.
patent: 5184549 (1993-02-01), Imamaki et al.
patent: 5241187 (1993-08-01), Ikeda et al.
patent: 5253581 (1993-10-01), Miki et al.
patent: 5285725 (1994-02-01), Imamaki et al.

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