Browse Prior Art Database

Document Loading System for Printer

IP.com Disclosure Number: IPCOM000042889D
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

James, EH: AUTHOR [+2]

Abstract

In order to load a document web into a printer in which the normal document drive is a tractor with pins engaging in holes in the edge of the web cooperating with a tensioning system, the tensioning system is converted into an auxiliary drive which is used to feed the leading edge of the web onto the tractor. This conversion operation is coupled with moving the platen of the printer so that there is more space through which to feed the web to the tractor. Figs. 1 and 2 illustrate this arrangement diagrammatically. Fig. 1 is a front view of a printer in which two tractors 1,2 are used to pull a document web 3 past the printing mechanism 4 of the printer. In order to tension the web, the web passes between at least two pairs of wheels at 5,6.

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Document Loading System for Printer

In order to load a document web into a printer in which the normal document drive is a tractor with pins engaging in holes in the edge of the web cooperating with a tensioning system, the tensioning system is converted into an auxiliary drive which is used to feed the leading edge of the web onto the tractor. This conversion operation is coupled with moving the platen of the printer so that there is more space through which to feed the web to the tractor. Figs. 1 and 2 illustrate this arrangement diagrammatically. Fig. 1 is a front view of a printer in which two tractors 1,2 are used to pull a document web 3 past the printing mechanism 4 of the printer. In order to tension the web, the web passes between at least two pairs of wheels at 5,6. Each pair of wheels consists of an idler wheel 7 on the front surface of the web cooperating with a pressure wheel 8 on the back surface of the web. The pressure wheels 8 are mounted on a drive shaft 9 and coupled to the shaft through a one-way clutch 10. During normal forward feed of the web the clutch 10 is disengaged and the pressure wheels 8 cooperate with the idler wheels 7 to impart a drag to the web, which provides the required tension. For reverse feed of the web the clutch 10 is engaged and the pressure wheels are driven from the shaft 9. In order to load the web, the platen 11, seen more clearly in Fig. 2 which is a side view of the printer, is moved away from the print mechanism 4...