Cartridge drive apparatus

Details Cartridge drive apparatus Cartridge drive apparatus

1975-08-14

1976-07-06

Gilreath, Stanley N.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

197151, 310103, 242 755, B65H 1704, B65H 1718

Patent

active

039677907

ABSTRACT:
Apparatus for driving a cartridge mounted rotatable ribbon capstan and take-up reel. A magnetic clutch assembly has a first gear driven by a motor for directly driving the capstan and a second gear magnetically driven by the first gear for driving the take-up reel through a gear train. The magnetic clutch assembly includes a magnetic drive ring secured to the first gear and having a plurality of inner peripheral teeth, a pair of annular magnetic members mechanically linked to the second gear, an annular magnet disposed between the magnetic members and a magnetic washer disposed below the lower magnetic member. The magnetic clutch assembly provides a yieldable driving force to the take-up reel which releases when the tension in the ribbon between the capstan and the take-up reel exceeds a predetermined threshold value. This threshold value may be adjusted by varying the dimension of the magnetic washer or the air gap between the drive ring and the annular magnetic members.

REFERENCES:
patent: 2845232 (1958-07-01), Johnson et al.
patent: 3301091 (1967-01-01), Reese
patent: 3502279 (1970-03-01), Bundschuh et al.
patent: 3724780 (1973-04-01), Wolf
patent: 3809336 (1974-05-01), Kollar et al.

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