Browse Prior Art Database

MULTI-MASS PRINTER HAMMER

IP.com Disclosure Number: IPCOM000024617D
Original Publication Date: 1981-Jun-30
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 95K

Publishing Venue

Xerox Disclosure Journal

Abstract

A hammer arrangement for an impact printer is disclosed which will enable plural impacts of the type element with a single energitation of the hammer actuator or driver. This configuration allows each impact to be of lower energy than heretofore utilized, with the following resultant advantages: lower print element wear, enabling fabrication of the printwheel from cheaper materials; lower noise; less expensive power supplies for lower power requirements; minimization of paper em bossing.

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XEROX DISCLOSURE JOURNAL

MULTI-MASS PRINTER HAMMER Proposed Richard G. Crystal Classification

U.S. C1. 101/93.36 Int. Cl. B41j 1/22

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F/G. /A F/G. /B Fie. 2

A hammer arrangement for an impact printer is disclosed which will enable plural impacts of the type element with a single energitation of the hammer actuator or driver. This configuration allows each impact to be of lower energy than heretofore utilized, with the following resultant advantages: lower print element wear, enabling fabrication of the printwheel from cheaper materials; lower noise; less expensive power supplies for lower power requirements; minimization of paper em bossing.

The hammer assembly 10 shown in Figures 1A and 1B is driven by an acturator (not shown), through a drive linkage 12 so as to swing about a pivot axis and against a print element 14 borne by a daisy-type printwheel 16. The energy imparted to the print element will cause the element to impact a suitable ribbon and urge it into contact with a sheet supported upon cylindrical platen 18.

More particularly, in one form of this invention, the hammer assembly 10 comprises a first mass 20 carried by a suitable support, such as yoke 22 from which extend drive pins 24. A second mass 26, may be mounted on a second yoke 28 to which is connected follower arms 30. The second yoke 28 is urged to its retracted home position defined by stop 32, by spring 34.

Volume 6 Number 3 May/June 1981 109

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MULTI-MASS PRINTER HAMMER (Cont'd)

In operation, the first mass 20 is driven by an appropriate actuator through linkage...