Browse Prior Art Database

Discontinuous Fiber Continuous Tape

IP.com Disclosure Number: IPCOM000076333D
Original Publication Date: 1972-Feb-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Catani, AC: AUTHOR [+4]

Abstract

A tape composed of aligned, continuous fibers in a resin matrix is processed to convert the reinforcing fibers into discontinuous aligned fibers having discrete lengths. Subsequent to such processing, tapes may be laminated together to produce a module of desired thickness.

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Discontinuous Fiber Continuous Tape

A tape composed of aligned, continuous fibers in a resin matrix is processed to convert the reinforcing fibers into discontinuous aligned fibers having discrete lengths. Subsequent to such processing, tapes may be laminated together to produce a module of desired thickness.

As shown in Fig. 1, the tape 3 is supplied from a reel 4 through a shearing station 5 and is taken up by a reel 7. Passage through shearing station 5 is controlled by two pairs of incrementing drive rolls 8 and 9, which are incremented in unison to impart a positive, stepwise motion to the stretch of tape disposed therebetween. The shearing station 5 functions as schematically shown in Fig. 2. A stationary die 10 presents a shear edge 11 and a cooperating shear blade 13 has a series of teeth, which present an interrupted cooperating shear edge 14. Each stroke of shear blade 13 causes a series of shearing actions to be performed on tape 3 along the line of shear edge 11. Intermediate each stroke, tape 3 is advanced (by incrementing rolls 8 and 9) and the shear blade 13 is indexed transversely to the tape in the direction of arrow A. A second supply reel 15 feeds release paper which adjoins the lower surface of tape 3 at the first pair of increment rolls 8, and thereafter moves in unison with the tape to cause adjoining convolutions of tape on take-up reel 7 to be separated by release paper.

In a representative application, the shear blade shear edges 14 each...