Browse Prior Art Database

Card Feed Apparatus

IP.com Disclosure Number: IPCOM000042519D
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Hunt, RE: AUTHOR

Abstract

In a printer in which paper is wrapped around a drum and the drum rotated past a printhead, there arises a need for a mechanism for allowing printing on extra long and/or stiff documents which cannot be wrapped around the drum. This article describes a low cost, compact device for accomplishing this function. In the figure, print drum 1 is fixedly attached to shaft 2 which pivots in the frame of the printer (not shown). Print head 3, which may be a thermal transfer type, is pivotable about post 4 mounted on carrier portion 5. In the normal paper printing mode, paper is fastened to the drum, and ribbon (not shown) is fed in a conventional manner between printhead 3 and the sheet. Carrier 5 is driven in the direction of arrow 6 as drum 1 rotates in the direction of arrow 7.

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Card Feed Apparatus

In a printer in which paper is wrapped around a drum and the drum rotated past a printhead, there arises a need for a mechanism for allowing printing on extra long and/or stiff documents which cannot be wrapped around the drum. This article describes a low cost, compact device for accomplishing this function. In the figure, print drum 1 is fixedly attached to shaft 2 which pivots in the frame of the printer (not shown). Print head 3, which may be a thermal transfer type, is pivotable about post 4 mounted on carrier portion 5. In the normal paper printing mode, paper is fastened to the drum, and ribbon (not shown) is fed in a conventional manner between printhead 3 and the sheet. Carrier 5 is driven in the direction of arrow 6 as drum 1 rotates in the direction of arrow 7. As shown, gear rack 8 is driven on guide rod 9 by segment gear 10 which is fixedly attached to shaft 2. Clamps 11 and 12 on rack 8 are provided for holding card 13 slightly skewed with respect to rod 9. The amount of skew is equal to one print line spacing per circumference length of drum 1. Card 13 is skewed to compensate for the movement of carrier 5, and printing on the card will be properly aligned. At the beginning of a cycle, card 13 is loaded into clamps 11 and 12. Rack 8 is at its furthermost left position, and printhead 3 is positioned at the start of the first writing line. As drum 1 rotates, card 13 is driven in the direction of arrow 14 by clamp rack 8. Printhead...