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Conventional and Document on Demand Printer

IP.com Disclosure Number: IPCOM000045394D
Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Rex, DK: AUTHOR

Abstract

In some instances it is desirable to have a printer which can be operated in both a conventional mode of printing and a document on demand mode of printing. The conventional mode of printing, as shown in Fig. 1, occurs when the tractor 10 or other paper feeding mechanism is positioned to pull the form 12 past the printhead 14. This occurs as the printhead 14 is actuated against platen 16 to cause characters to be printed on the form 12. After all of the printing has been completed, the form may be removed by tearing it at the tear line, as shown in Fig. 1.

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Conventional and Document on Demand Printer

In some instances it is desirable to have a printer which can be operated in both a conventional mode of printing and a document on demand mode of printing. The conventional mode of printing, as shown in Fig. 1, occurs when the tractor 10 or other paper feeding mechanism is positioned to pull the form 12 past the printhead 14. This occurs as the printhead 14 is actuated against platen 16 to cause characters to be printed on the form 12. After all of the printing has been completed, the form may be removed by tearing it at the tear line, as shown in Fig. 1.

For the document on demand mode of printing, it is desirable to be able to tear the form as close to the printhead 14-platen 16 mechanism as possible. This permits the form to be removed immediately after printing with a minimum of wasted space upon which no information is printed on the next following form. This wasted space is the area between the tear line and the printhead 14. Fig. 2 shows how to use the apparatus of Fig. 1 in the document on demand printing mode. In this case, the form 12 is pushed by tractor 10 towards printhead 14 and platen 16 rather than pulled passed it as shown in Fig. 1. Thus, in Fig. 2, the only wasted space on the following form is that short distance between the tear line and the printhead 14.

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