Printing – Selective or progressive – Bed and platen machines
Patent
1989-03-23
1990-11-06
Crowder, Clifford D.
Printing
Selective or progressive
Bed and platen machines
101 9309, 400146, B41J 120
Patent
active
049676628
ABSTRACT:
High speed impact line printers comprise a continuously moving type carrier, such as an endless belt or band having engraved type characters movable at constant speed parallel to a row of print hammers. A print medium such as a continuous paper web and an ink ribbon are located between the hammers and the type carrier. The hammers are uniformly spaced parallel with the type carrier to define a print line. The spacing of the hammers corresponds to the desired spacing of the printed characters when printed and generally has one print hammer for each print position. An interposer member located between the print hammers and the print paper web enables certain characters such as vertical or horizontal bars of bar code type can be printed in the region of the clearance gaps between hammers. The interposer member can be either a thin, flexible strip or sheet of elastomeric material such as polyimide which spans a plurality of the hammers or a comblike metal member having individual flexure finger elements aligned with the print hammers. The finger elements are mutually separated by a gap which can be much narrower than the clearance gaps between the hammers.
REFERENCES:
patent: 1181832 (1916-05-01), Brunn
patent: 2694481 (1954-11-01), Sharp
patent: 3312164 (1967-04-01), Sebring
patent: 3610140 (1971-10-01), Kondur
patent: 4027586 (1977-06-01), Hubbard
patent: 4762063 (1988-08-01), Yeagle
patent: 4764039 (1988-08-01), Bublitz
IBM Tech. Disc. Bulletin, vol. 17, No. 5, Oct. 1974, p. 1320, "Label Printer", R. L. Gilbert.
IBM Tech. Disc. Bulletin, vol. 23, No. 10, Mar. 1981, p. 4739, "Bar-Half Bar Code Pattern", A. H. Ett.
IBM Tech. Disc. Bulletin, vol. 27, No. 7A, Dec. 1984, p. 3897, "Wear Prevention for Print Hammers", R. G. Bayer.
Clark William D.
Lee Ho C.
O'Toole John R.
Crowder Clifford D.
Gasper John S.
International Business Machines Corp.
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