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Printer Continuous Form Feed Manually Declutched for Cut-Sheet Operation

IP.com Disclosure Number: IPCOM000039497D
Original Publication Date: 1987-Jun-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

James, EH: AUTHOR

Abstract

Most printers are designed to primarily feed continuous forms, usually by means of pin-feed sprockets. Some printers also accommodate cut forms, usually by providing a set of pressure feed rolls in addition to the pin-feed sprockets. Various methods exist which permit cut-form use without removing the continuous forms from the machine, usually by providing a path which interposes the cut form between the continuous form and the print head. With such an arrangement, both forms advance at the same time (line space) as the cut form is being printed. Upon completion and removal of the cut form, the continuous form is rolled back to the beginning of the page, and operation is resumed. This arrangement is not satisfactory for multi-part continuous forms.

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Printer Continuous Form Feed Manually Declutched for Cut-Sheet Operation

Most printers are designed to primarily feed continuous forms, usually by means of pin-feed sprockets. Some printers also accommodate cut forms, usually by providing a set of pressure feed rolls in addition to the pin-feed sprockets. Various methods exist which permit cut-form use without removing the continuous forms from the machine, usually by providing a path which interposes the cut form between the continuous form and the print head. With such an arrangement, both forms advance at the same time (line space) as the cut form is being printed. Upon completion and removal of the cut form, the continuous form is rolled back to the beginning of the page, and operation is resumed. This arrangement is not satisfactory for multi-part continuous forms. It is apparent that in this case, when a cut form is printed, the impression carries through to the carbon copies of the multi-part form, and that page is wasted. The present embodiment provides a manually-operated clutch to decouple the pin-feed drive during a cut-form operation. The figure shows that pin-feed drive gear 1 has a split hub 2, which is a loose fit on pin-feed drive shaft 3. Surrounding hub 2 is one arm 4 of actuating lever 5, having a figure-eight configuration in which the two loops are of different diameters. As shown, the larger of the two loops is around hub 2 and clears its circumference by gap 6. Since gear 1 and shaft 3 are...