G - Physics – 02 – B
Patent
G - Physics
02
B
240/150, 18/547
G02B 5/128 (2006.01) E01F 9/00 (2006.01) E01F 9/04 (2006.01) F21V 7/04 (2006.01) G09F 13/16 (2006.01)
Patent
CA 1085363
ABSTRACT OF THE DISCLOSURE: A method for producing a composite retro-reflecting system comprising a transparent globule having an uncoated first partially essentially part-spherical surface portion positioned for light impingement and a plurality of light beams focusing and reflecting means, there means comprising transparent microspheres externally coated by a reflective coating, adjacent and secured by a transparent binder subs- tance to a second surface portion opposite the first surface portion. The method comprises the step of causing a heated sheet of uniform thickness and made of a thermoplastic trans- parent polymeric material to be forcedly calendered between two adjacent parallel forming cylinders having forming re- cesees evenly and equally arranged on their cylindrical sur- faces and phasedly counter rotated for producing from the sheet an essentially planar intermediate product having opposite faces comprising a plurality of bulges designed to form the first and respectively the second globule sur- face portions, the bulges being interconnected by thin breakable parts, and the step of producing the globules by detaching from each other parts each including a pair of oppositely located bulges.
257062
Eigenmann Ludwig
Perley-Robertson Hill & Mcdougall Llp
LandOfFree
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