Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1985-01-14
1987-03-10
Lieberman, Allan M.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156280, 350105, 427162, 427204, 428164, 428325, 428344, 428413, 428161, G02B 5128, B32B 300
Patent
active
046489320
ABSTRACT:
A new embedded-lens retroreflective sheeting which exhibits superior properties, including superior angularity, and which is made by a new method of manufacture involving lamination techniques. Microspheres are embedded into a first polymeric layer to less than one-half the average diameter of the microspheres, and a pre-formed spacing film is laminated to the microsphere covered surface of the first layer so as to obtain conformation of the spacing film in a substantially constant thickness over a useful portion of the back surface of the microspheres.
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Lieberman Allan M.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Smith James A.
Tamte Roger R.
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