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Method of Making Grain Long Card Sets

IP.com Disclosure Number: IPCOM000074718D
Original Publication Date: 1971-Jun-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Maynard, KB: AUTHOR

Abstract

A web of cardstock is slit into multiple equal width streams that are rewound side-by-side onto a common core. This core is mounted on a single unwind stand, and the preslit webs are drawn through the press by common feed rolls, tension control units, etc. Any slight initial mismatch of web lengths will equalize during start-up, resulting in uniform tension in all webs. Since each web is slit from the same roll, each will have the same humidity and stretch characteristics and drag equally against the unwind brake.

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Method of Making Grain Long Card Sets

A web of cardstock is slit into multiple equal width streams that are rewound side-by-side onto a common core. This core is mounted on a single unwind stand, and the preslit webs are drawn through the press by common feed rolls, tension control units, etc. Any slight initial mismatch of web lengths will equalize during start-up, resulting in uniform tension in all webs. Since each web is slit from the same roll, each will have the same humidity and stretch characteristics and drag equally against the unwind brake.

If the set is to include card and noncard plies, this single-core technique may be used for all noncard plies of the same type (e.g., carbon or paper slips); or the noncard plies may be slit in-line on the press before being brought into contact with the card webs. In either event, the noncard plies should preferably be slightly narrower than the card plies to provide neat set edges. Turning bars or other conventional means may be used to interpose noncard plies between card plies before the webs are adhered into a multiple ply web and severed into unit sets.

This method reduces operator set-up time and the amount of floor space required for unwind stands, drag brakes, tension controls, etc. It also obviates the need for trimming the edges of the superposed plies as is presently required to achieve neat set edges.

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