Printing – Selective or progressive – Bed and platen machines
Patent
1985-10-16
1987-10-20
Pearson, Charles A.
Printing
Selective or progressive
Bed and platen machines
400124, B41J 312
Patent
active
047006250
ABSTRACT:
A needle-carrying head for a printing machine has needles controlled by electro-magnets. The coils of the electro-magnets are soldered to pins carried by support ears for the coils. The pins pass through printed circuit boards to which they are soldered. The coils are engaged on cores constituted by limbs of respective fork-shaped members the second limb of which serves to complete the magnetic circuit. The two limbs of each fork-shaped member are interconnected by means of a transverse portion constituting a yoke, secured by setting into one or the other of two plates forming, with a central plate made of plastics material, a cage-shaped frame of the needle-carrying head. The printed circuit boards are thus interposed between the electro-magnets and the front plate of the frame on the one hand, and between the electro-magnets and the rear plate on the other hand.
REFERENCES:
patent: 3896918 (1975-07-01), Schneider
patent: 4230038 (1980-10-01), Hebert
patent: 4230412 (1980-10-01), Hebert
patent: 4279521 (1981-07-01), Kightlinger
patent: 4382701 (1983-05-01), Davenport
patent: 4484170 (1984-11-01), Wirth et al.
patent: 4572070 (1986-02-01), Moulin
Lisinski et al.; "Double Density Line Printer Magnet Assembly"; IBM Tech. Disc. Bull.; vol. 23, No. 1, pp. 44-45; Jun. 1980.
Caracteres S.A.
Pearson Charles A.
Wiecking David A.
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