Apparatus and method for uniformly irradiating a strand

Details Apparatus and method for uniformly irradiating a strand Apparatus and method for uniformly irradiating a strand

1993-02-26

1994-05-10

Dzierzynski, Paul M.

Radiant energy

Irradiation of objects or material

Ion or electron beam irradiation

25045311, H01J 3700

Patent

active

053110277

ABSTRACT:
An apparatus and method for uniformly irradiating a strand of plastic material by twisting the strand as it is advanced in a plurality of paths transverse to an electron beam. A set of pinch rolls are positioned on opposites ends of the electron beam generator to advance and twist the strand. Lift cams periodically release the twist on the strand at positions of maximum twist by forcing the pinch rolls apart. Each set of pinch rolls includes upper and lower rolls adjacent a medial roll which, in turn, is driven in alternating axial directions to impart twist to the strand. The medial rolls are driven in alternating axial directions by a cammed surface thereon and a cam follower and synchronized to move 180.degree. out of phase from each other. A series of three spaced apart idler rolls are also provided to form a tandem figure-eight pattern in side view for the strand to compensate for reel set in the strand.

REFERENCES:
patent: 4226687 (1980-10-01), Sasaki et al.
patent: 5051600 (1991-09-01), Schuetz et al.

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