Band line printer with grooved platen

Printing – Selective or progressive – Bed and platen machines

Patent

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Details

400146, 400656, 400662, B41J 1108

Patent

active

053159284

ABSTRACT:
An impact printer has a print band moving longitudinally around pulleys with one side of the band moving in contact along a rigid platen and the other side having engraved characters presented along a print line of a print medium (e.g. paper and ink ribbon). The leading edge of platen is squared off (e.g. sharp) to scrape contamination off the band. A row of hammers impact the print medium against the band between the hammers and an impact surface of the platen. The impact surface of the platen contains multiple longitudinal grooves which start slightly back from the leading edge of the platen and which prevent increased friction force between the band and platen from occurring as the band wears the platen impact surface smooth.

REFERENCES:
patent: 4211166 (1980-07-01), Hardt
patent: 4301725 (1981-11-01), Hiki et al.
patent: 4489650 (1984-12-01), Hasler et al.
patent: 4510862 (1985-04-01), Alt et al.
patent: 4540296 (1985-09-01), Thorne
IBM Technical Disclosure Bulletin, vol. 30, No. 6, Nov. 1987, "Print Band Lubrication Method".
IBM Technical Disclosure Bulletin, vol. 27, No. 6, Nov. 1984, "Multi-Function Impact Detector for Impact Printers".
IBM Technical Disclosure Bulletin, vol. 25, No. 7A, Dec. 1982, "Printer Platen For Band Printer".
IBM Technical Disclosure Bulletin, vol. 23, No. 4, Sep. 1980, "Wear Resistant Coating for Platens of Steel Belt Printers".

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