Cam action shaft lock device and method

Details Cam action shaft lock device and method Cam action shaft lock device and method

2005-09-20

2005-09-20

Funk, Stephen R. (Department: 2854)

Typewriting machines

Carriage or carriage-moving or movement-regulating mechanism

Means for repositioning carriage or platen thereon

C400S674000, C101S093110

Reexamination Certificate

active

06945719

ABSTRACT:
A method and device for locking and unlocking a print head assembly along a shaft in an addressing machine. The print head assembly is fixedly mounted on a locking mechanism, which comprises a cylindrical body slideably mounted on the shaft and a cam ring rotatably mounted over the cylindrical body. The cylindrical body has a slot for seating an elongated spline. When the locking mechanism is operated in a locking position, the inner circumference of the cam ring presses the spline against the shaft, preventing the cylindrical body from moving along the shaft. The cam ring has a relief on its inner circumference such that, when the cam ring is rotated to the unlocked position, the spline is partially seated in the relief, thereby reducing the pressure exerted by the spline against the shaft. As such, the position of the print head assembly can be adjusted.

REFERENCES:
patent: 4403879 (1983-09-01), Vought et al.
patent: 4773773 (1988-09-01), Itoh
patent: 5366305 (1994-11-01), Christianson
patent: 6435650 (2002-08-01), Nishioka et al.
patent: 6524021 (2003-02-01), Johnson et al.

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