Typewriting machines – Including control of format by programmed-control-system
Reexamination Certificate
2006-01-31
2006-01-31
Chau, Minh (Department: 2854)
Typewriting machines
Including control of format by programmed-control-system
C400S074000, C400S579000, C101S481000, C101S485000, C347S019000, C347S116000
Reexamination Certificate
active
06991387
ABSTRACT:
In a printing sheet conveying direction, registration adjustment patterns can be printed in a large area on a printing sheet and can be read. Specifically, along a first feeding path, printing heads print registration adjustment patterns in a first area on a printing sheet, and a sensor measures the densities of the patterns on the printing sheet after it has been reversely fed. A printing sheet can be reversely fed along a horizontal second feeding path without contacting the PE sensor lever. In this state, the printing sheet is fed in the forward direction so that a second area for printing registration adjustment patterns is adjacent to the area A, and the printing heads sequentially print registration adjustment patterns. The printing sheet is then reversely conveyed a predetermined distance and the densities of the patterns are measured.
REFERENCES:
patent: 6065400 (2000-05-01), Van Weverberg
patent: 6084606 (2000-07-01), Moriyama
patent: 6092939 (2000-07-01), Nishikori et al.
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patent: 6409301 (2002-06-01), Takata et al.
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