Unit drive assembly

Details Unit drive assembly Unit drive assembly

1989-08-01

1990-08-28

Fuller, Benjamin R.

Registers

Stamp

74 63, 742163, 101 91, G06F 100

Patent

active

049527843

ABSTRACT:
A unit drive assembly (2; 84; 102) is used with postage meters (4) of the type which include a stationary base (6; 86; 104, 106) and moveably print head (8; 88; 108). The base and print head are mechanically connected so that input information to the base is mechanically transmitted to the print head. The assembly includes one or more drive tracks (10; 90; 110) along which a series of balls (16; 96; 112) are positioned. A first portion (12; 118; 120) of the drive track is carried by the base while a second portion (14; 116) is carried by the head. The first and second portions are aligned when the head is in the home position; it is at this time a ball drive (28; 42; 92; 102), carried by the base, moves the balls along the track discrete distances equal to one or more ball diameters. The head includes one or more print wheels (36) driven by the balls positioned along the second portion of the track so that the distances the print wheels rotate, which determines the value to be printed, depend upon the distances the balls are driven along the tracks.

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patent: 4476735 (1984-10-01), Cantwell
patent: 4658122 (1987-04-01), Payn et al.
patent: 4777353 (1988-10-01), Hendrickson

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