Print head

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2007-07-24

2007-07-24

Colilla, Daniel J. (Department: 2854)

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

C400S124200, C400S124110, C400S124170, C400S124230

Reexamination Certificate

active

10543401

ABSTRACT:
A needle guide (5) is composed of a first guide wall (5a) and a second guide wall (5b) arranged at a distance x from each other. Each of these guide walls is formed with through holes through which needles penetrate and which extends parallel to the longitudinal direction of a needle bunch, the through holes of the first guide wall and the second guide wall for one needle is shifted from each other in the convergence direction of the needles with a shift amount δn determined by the distance x and a convergence angle θn of the needle.

REFERENCES:
patent: 5540508 (1996-07-01), Asada et al.
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patent: 2582809 (1998-07-01), None
Microfilm of specification (pp. 289-300) and drawings (pp. 301-303) annexed to Japanese Utility Model Application No. 072257/1988 (Laid-open No. 175823/1989), Toshiba Corp., Dec. 14, 1989.
Microfilm of specification (pp. 524-528) and drawings (pp. 529-530) annexed to Japanese Utility Model Application No. 074715/1989 (Laid-open No. 016244/1992), Seiko Epson Corp., Feb. 19, 1991.
Microfilm of specification (pp. 505-513) and drawings (pp. 514-516) annexed to Japanese Utility Model Application No. 045553/1988 (Laid-open No. 153940/1989), Shinko Seisakusho Co., Ltd., Oct. 24, 1989.
Microfilm of specification (pp. 380-386) and drawings (pp. 387-388) annexed to Japanese Utility Model Application No. 122872/1984 (Laid-open No. 037937/1986), Alps Electric Co., Ltd., Mar. 10, 1986.
Microfilm of specification (pp. 352-358) and drawings (pp. 359-360) annexed to Japanese Utility Model Application No. 004608/1982 (Laid-open No. 107840/1983), Oki Electric Industry Co., Ltd., Jul. 22, 1983.

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