Browse Prior Art Database

Low-Cost Single-Line Printer

IP.com Disclosure Number: IPCOM000042887D
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 60K

Publishing Venue

IBM

Related People

Archer, JL: AUTHOR

Abstract

A wire matrix print head is fixedly mounted to a printer frame and does not move within the frame as is usually the case. Idler rollers are mounted above and below the print head. Paper to be printed is fed between a driven platen and the idler rollers so as to transport the paper in front of the print head for printing. The platen is mounted on a pivoting support. The pivoting support includes the platen drive motor and the gear train which drives the platen. When paper is inserted near the platen-print head gap, a sensor turns on the motor which drives the platen to draw the paper into the nip between the platen and the idler rolls. As the paper is drawn into the nip between the platen and the idler rolls, the platen assembly pivots to provide for the thickness of the paper. Fig.

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Low-Cost Single-Line Printer

A wire matrix print head is fixedly mounted to a printer frame and does not move within the frame as is usually the case. Idler rollers are mounted above and below the print head. Paper to be printed is fed between a driven platen and the idler rollers so as to transport the paper in front of the print head for printing. The platen is mounted on a pivoting support. The pivoting support includes the platen drive motor and the gear train which drives the platen. When paper is inserted near the platen-print head gap, a sensor turns on the motor which drives the platen to draw the paper into the nip between the platen and the idler rolls. As the paper is drawn into the nip between the platen and the idler rolls, the platen assembly pivots to provide for the thickness of the paper. Fig. 1 is a top view of the print head and pivoting platen assembly. Fig. 2 is a side view of the same print head and pivoting platen assembly. Print head 11 is fixedly mounted to support 13. Print head 11 carries idler rolls 15 and 17. Idler rolls 15 and 17 provide the critical gap between the face of the print head and the document being printed. Facing the print head is a pivoting platen assembly including platen 19 mounted on shaft 21 and driven by gear 23. Motor 25 drives gear 23 through an idler gear. The entire platen assembly pivots on pivot 27 in the direction shown by arrow 29 when a document 31 is drawn into the nip between platen 19 and idler roll 17...