MACHINE FOR CONTINUOUSLY PRODUCING LARGE AREA LIGHT POLARIZING PANELS

• US 3,772,128 A
• Filed: 09/21/1970
• Issued: 11/13/1973
• Est. Priority Date: 09/21/1970
• Status: Expired due to Term

• Current Assignee: Naplc
• Original Assignee: Myron Kahn, William R. Werderman
• Inventors: Kahn, Myron, Werderman, William R.
• Primary Examiner(s): Drummond, Douglas J.
• Application Number:
  US05/073,847
• Time in Patent Office: 1,149 Days
• Field of Search: 156/244,555,500,324,322,498
• US Class Current: 156/555
• CPC Class Codes: B29C 67/20 for porous or cellular articles, e.g. of foam plastics, coarse-pored chemical aspects of working up macro-molecular substances to porous or cellular articles C08J9/00
• CPC Class Codes: B32B 2307/42 Polarizing, birefringent, filtering
• CPC Class Codes: B32B 2551/00 Optical elements
• CPC Class Codes: B32B 2607/00 Walls, panels
• CPC Class Codes: B32B 27/00 Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18
• CPC Class Codes: B32B 27/065 of foam
• CPC Class Codes: B32B 37/08 characterised by the cooling method
• CPC Class Codes: B32B 5/18 characterised by features of a layer of foamed material
• CPC Class Codes: F21V 3/04 characterised by materials, surface treatments or coatings
• CPC Class Codes: G02B 5/3025 Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state G02B5/3008, G02B5/3016 take precedence
• CPC Class Codes: Y10T 156/1741 Progressive continuous bonding press [e.g., roll couples]

Abstract

A large area light polarizing panel is continuously produced by laminating a layer of a light transmitting foamed cellular plastic material between a self supporting plastic base sheet and a thin plastic cover sheet while the base sheet is hot enough to cause the members to bond together.

Claims

2. A device according to claim 1 in which the first set of laminating rollers are watercooled to reduce the temperature of the base plastic.

3. A device according to claim 1 in which the base plastic temperature is reduced by a source of cooling air.

4. A device according to claim 1 in which the second rollers include a let off roller spaced from the surface of the base plastic not less than one-sixteenth of an inch and not more than three-eighths of an inch whereby the cellular plastic material makes a flat angle with the base plastic as the approach the first laminating rollers.