Acoustical damping for printer

Details Acoustical damping for printer Acoustical damping for printer

1977-11-30

1980-04-08

Wright, Jr., Ernest T.

Typewriting machines

Sheet or web

Including friction-feed means

4006363, 400641, 400661, 400662, 400689, B41J 1302

Patent

active

041970241

ABSTRACT:
An apparatus for damping the acoustical impact noise traveling along a length of paper as it passes through a printer including resilient urethane foam rollers in engagement with a large proportion of the width of the paper with a pressure damping roller depressing portions of the paper deeply into engagement with the resilient roller to enable the resilient roller to damp acoustical energy traveling along the length of the paper.

REFERENCES:
patent: 636941 (1899-11-01), Barron
patent: 944746 (1909-12-01), Rice
patent: 1098840 (1914-06-01), Rennie
patent: 1418506 (1922-06-01), Wood
patent: 1427909 (1922-09-01), Peterson
patent: 2152858 (1939-04-01), Becker
patent: 2244095 (1941-06-01), Botham et al.
patent: 2561453 (1951-07-01), Von Duyke
patent: 3742848 (1973-07-01), Huntoon et al.
patent: 3825103 (1974-07-01), Riley
IBM Technical Disclosure Bulletin, "Polyurethane Foam Formulation and Process," McSpadden, vol. 19, No. 9, Feb. 1977, p. 3238.

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