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COUNTERBALANCED RECIPROCATING PRINTHEADS

IP.com Disclosure Number: IPCOM000026598D
Original Publication Date: 1992-Dec-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 83K

Publishing Venue

Xerox Disclosure Journal

Abstract

Many printers use reciprocating print mechanisms. Among these are impact printers and most ink jet printers. As printer printheads start and stop or reach end of travel and reverse direction, momentum transfers to the printer from the printhead. Generally, when a printer mass is small and its printhead acceleration and velocity are large, the printer body has a tendency to oscillate. As a result of the tradeoff between printer mass and printhead mass and velocity, high speed printers are constructed with more mass to bring vibrations to an acceptable level.

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XEROX DISCLOSURE JOURNAL

COUNTERBALANCED Proposed Classification RECIPROCATING PRINTHEADS U.S. C1.346/139B Hardy Sonnenberg Int. C1. Gold 15/16

/4 /7

FIG. I

XEROX DISCLOSURE JOURNAL Vol. l'i No 6 Xovember!December 1992 427

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COUNTERBALANCED RECIPROCATING PRINTHEADS (Cont'd)

I 428 XEROX DISCLOSURE JOURNAL Vol17 No 6 November/December 1992

Many printers use reciprocating print mechanisms. Among these are impact printers and most ink jet printers. As printer printheads start and stop or reach end of travel and reverse direction, momentum transfers to the printer from the printhead. Generally, when a printer mass is small and its printhead acceleration and velocity are large, the printer body has a tendency to oscillate. As a result of the tradeoff between printer mass and printhead mass
and velocity, high speed printers are constructed with more mass to bring vibrations to an acceptable level.

Disclosed and shown in Figure 1 is counterbalanced printhead 2 with guide 4, wire 5 and pulley 6. Counterbalanced printhead 2 decouples printer mass and printer speed by transferring momentum between printhead 7 and counterweight 8 instead of the printer body (not shown). Counterweight 8 prevents a printer from moving around during the printing process (starting, stopping and reversing print direction). Printer configurations are decoupled when the product of printhead mass and velocity are equal to the product...