Print wheel adjustment device for franking machines

Details Print wheel adjustment device for franking machines Print wheel adjustment device for franking machines

1991-08-06

1992-11-17

Burr, Edgar S.

Printing

Selective or progressive

Rotary machines

101 45, B41L 4746

Patent

active

051633663

ABSTRACT:
Device for adjusting print wheels of a franking machine print head where said print head is removable from a base unit and comprises a print drum incorporating said print wheels and carried at a forward end of a sleeve having its rear end projecting from the rear of the print head. The base unit has a location at the front for the print head and comprises a drive mechanism, control circuits connected to the drive mechanism and a rotating shaft coupled to the drive mechanism and partially projecting into the location for the print head to receive the sleeve on it and to drive the print drum. The device comprises a drive system comprising at least one drive motor and at least one driving gear coupled to the control circuit. Driven gears are each coupled to a different print wheel mounted with it in the print head. Sliding rods with front and rear racks thereon are mounted in the print head with the front rack of each rod meshing with one of the driven gears to impart thereto movement from the drive system. The drive system is mounted in the base unit in an interface housing behind the housing for the print head and at the periphery of the shaft and the sleeve fitted over the shaft. The rear racks of the sliding rods project at least partly from the rear of the print head and are inserted with the rear end of the sleeve into the base unit. The drive system is thereby adapted to be engaged with the rear racks of the sliding rods and constitutes in the base unit a control interface for adjusting the print wheels of the print head.

REFERENCES:
patent: 4398845 (1983-08-01), Denzin et al.
patent: 4520725 (1985-06-01), Haug
patent: 4601240 (1986-07-01), Sette
patent: 4603627 (1986-08-01), Pollak, Jr. et al.
patent: 4702164 (1987-10-01), Muller
patent: 4723348 (1988-02-01), Le Meur et al.
patent: 4774881 (1988-10-01), Schubert
patent: 4858525 (1989-08-01), Hubbard et al.
patent: 5050495 (1991-09-01), Wu

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