Image registration board and compressible pin assembly

Details Image registration board and compressible pin assembly Image registration board and compressible pin assembly

1991-10-18

1996-01-23

Wirthlin, Alvin

Geometrical instruments

Gauge

Collocating

G01D 2100

Patent

active

054856795

ABSTRACT:
An image board comprising a base layer of aluminum, a filler layer of an amorphous polyester film such as Kodar.RTM. PETG copolyester film extrusion, two intermediate layers of polyester film such as Mylar.RTM., two intermediate layers of a low molecular weight polymer such as Melanex-T.RTM., and a bed layer of a rigid acrylic/PVC thermoplastic sheet having a top surface defining a level hair-line cell structure. The thickness of the image board is decreased compared with prior art image boards, to within a range of approximately 0.126"-0.131" at a minimum to approximately 0.171" at a maximum. The image board exhibits enhanced characteristics of stability, flexibility, and resistance to differential thermal expansion. A compressible register pin is selectively mounted on and removed from the reverse side of the image board, being slidably inserted and frictionally engaged in an aperture and contacting the base and intermediate layers. A flange on the base cap surrounds the aperture but projects downwardly from the reverse side of the base layer without causing interference when the image board is placed on a rigid working surface or within a platemaker.

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