Mechanism for centering rolls of paper stock supplied for printi

Details Mechanism for centering rolls of paper stock supplied for printi Mechanism for centering rolls of paper stock supplied for printi

1997-12-18

1999-01-19

Yan, Ren

Typewriting machines

Means auxiliary to typewriting function

Frame, casing, or support for typewriter

400 88, 2425631, B41J 2902

Patent

active

058607536

ABSTRACT:
An improved mechanism for centering a roll of paper stock for printing in a portable printer is provided, in which the printer has a housing with a cavity and an opening from a side thereof to provide a receptacle for the roll. The centering mechanism includes a spindle disposed in the cavity toward the opening and mounted in the housing for rotation about an axis, and a pair of arms coupled to each other to move in opposite directions with respect to a center between the arms. The arms engage the two opposing ends of the roll when received on the spindle for centering the roll on the spindle. The arms are coupled to each other by a rack and pinion assembly which moves the arms in opposite direction to each other responsive to a force applied by an operator to one of the arms when a roll is received on the spindle.

REFERENCES:
patent: 3987974 (1976-10-01), Mayer
patent: 4556422 (1985-12-01), Torbeck
patent: 4833985 (1989-05-01), Kojima et al.
patent: 5092688 (1992-03-01), Haennelt et al.
patent: 5267800 (1993-12-01), Petteruti et al.
patent: 5447379 (1995-09-01), Pou
patent: 5505406 (1996-04-01), Summey, III

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