Wire dot print head having a bipartite partitioning sheet

Details Wire dot print head having a bipartite partitioning sheet Wire dot print head having a bipartite partitioning sheet

1991-01-23

1992-08-25

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 224

Patent

active

051413418

ABSTRACT:
In a wire dot print head, swinging members are formed of plate springs and armatures, which are attracted toward a core to resiliently deform a plate spring when an associated coil is not energized, and are released and moved forward when the coil is energized. The swinging members are swung about the forward tip ends of fulcrum members. A partition sheet is interposed between the rear surfaces of the swinging members and both the front ends of the cores and the front tip ends of the fulcrum members to interrupt transfer of grease, and to prevent direct contact of the cores and the fulcrum members with the armatures. The partition sheet includes a front plastic film, a metallic residual sheet, and a rear plastic film which are stacked in the stated order from the front side to the rear side of the print head. The front film is bonded to the metallic residual sheet over the entire surface of the metallic residual sheet. By bonding the front film and the metallic residual sheet, migration of the grease from the rear side to the front side of the partition sheet is prevented, and adhesion of the grease to the plate springs is also prevented. Moreover, because of the bonding, the metallic residual sheet is prevented from contacting the air and hence from rusting.

REFERENCES:
patent: 4244658 (1981-01-01), Mori
patent: 4272748 (1981-06-01), Fugate et al.
patent: 4674896 (1987-06-01), Yasunaga et al.
patent: 4692043 (1987-09-01), Ando et al.
patent: 4995574 (1991-02-01), Cattaneo
Patent Abstracts of Japan, vol. 13, No. 591 (M-913), Dec. 26, 1989, JP-A-1 249 357.
Patent Abstracts of Japan, vol. 10, No. 265 (M-515), Sep. 10, 1986, JP-A-61 089.
Patent Abstracts of Japan, vol. 6, No. 120 (M-140), Jul. 3, 1982, JP-A-57 047 672.

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