Retroreflective sheet

Stock material or miscellaneous articles – Layer or component removable to expose adhesive – Release layer

Reexamination Certificate

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Details

C428S144000, C428S173000

Reexamination Certificate

active

07906193

ABSTRACT:
An original sheet of a retroreflective sheet includes plural glass beads with a metal reflective layer provided on lower hemisphere surfaces thereof, a resin support sheet for supporting the glass beads, and a transparent cover film disposed on a surface side of the resin support sheet, wherein the resin support sheet and the cover film are connected to each other by heat press emboss forming from a rear face of the resin support sheet so as to form the original sheet of the retroreflective sheet, and a retroreflective sheet laminate includes a pressure-sensitive adhesive layer and a resin release film for covering the pressure-sensitive adhesive layer on a rear side of the original sheet of the retroreflective sheet. An embossed groove by heat press emboss forming was filled with a part of the pressure-sensitive adhesive layer, a residual rate of the pressure-sensitive adhesive layer ranges between 10% and 50% inclusive, and a fall time of the pressure-sensitive adhesive layer ranges between 10 hours and 150 hours inclusive.

REFERENCES:
patent: 4340273 (1982-07-01), Jack et al.
patent: 5069964 (1991-12-01), Tolliver et al.
patent: 5415911 (1995-05-01), Zampa et al.
patent: 6326072 (2001-12-01), Ojeda et al.
patent: 2002/0004135 (2002-01-01), Buccellato et al.
patent: 2002/0155276 (2002-10-01), Owusu et al.
patent: 8-43615 (1996-02-01), None
patent: 8-100155 (1996-04-01), None
patent: 2000-329918 (2000-11-01), None
patent: 2002-317156 (2002-10-01), None
patent: 2003-213228 (2003-07-01), None
Search Report of the corresponding European Patent Application Number (EP 03 81 1892) mailed on Jan. 24, 2008.

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