Vacuum sheet

Details Vacuum sheet Vacuum sheet

G - Physics

03

G

154/119

G03G 5/14 (2006.01) G03B 27/20 (2006.01) G03F 7/20 (2006.01)

Patent

CA 1220708

ABSTRACT There is described an improved vacuum sheet for use in contact vacuum frames, the sheet including at least two planar sheets of material joined together to form a seam therebetween, and a third planar sheet of material applied to one side of said at least two sheets to be substantially centered over the seam formed therebetween.

470836

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