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Browse Prior Art Database

Method of Making Splices

IP.com Disclosure Number: IPCOM000075566D
Original Publication Date: 1971-Oct-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Voorhis, AM: AUTHOR

Abstract

Problems of poor joint strength arise in butt and lap splices made between mating web ends. Joint weakness is especially a problem where external overlapping adhesive tape is not used and splices are made using only adhesive between the web ends. Better joint strength is achieved in the latter case if the web ends are joined in a press, wherein at least a portion of the press which makes contact with the joint area includes shallow grooves or channels. In operation, such grooves or channels encourage adhesive which overflows the joint to flow along the external channels. When dried, the external adhesive in the grooves forms a network joining the external surfaces of the webs and thereby provides increased joint strength with the addition of little bulk or mass.

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Method of Making Splices

Problems of poor joint strength arise in butt and lap splices made between mating web ends. Joint weakness is especially a problem where external overlapping adhesive tape is not used and splices are made using only adhesive between the web ends. Better joint strength is achieved in the latter case if the web ends are joined in a press, wherein at least a portion of the press which makes contact with the joint area includes shallow grooves or channels. In operation, such grooves or channels encourage adhesive which overflows the joint to flow along the external channels. When dried, the external adhesive in the grooves forms a network joining the external surfaces of the webs and thereby provides increased joint strength with the addition of little bulk or mass.

In the press, the grooves or channels may be disposed in any pattern, such as lines or diamonds, so long as they are continuously adjacent to both of the web ends during splicing. The grooved portion of the press may be resilient if it is desired to leave the webs unmarked. Alternatively, if it is desired to indent the webs for adhesive flow along the resulting scored web surfaces, the patterned portion of the press may be sharp and hard. Imprint of the pattern on the webs can be controlled or avoided by controlling press pressure and temperature. The width of the pattern need only be sufficient to contact both mated web ends simultaneously, while the depth of the grooves need onl...