EP 1066152 A1 20010110 - METHOD AND APPARATUS FOR MAKING LENTICULAR PLASTICS
Title (en)
METHOD AND APPARATUS FOR MAKING LENTICULAR PLASTICS
Title (de)
VERFAHREN UND GERÄT ZUM HERSTELLEN EISENFÖRMIGER KUNSTSTOFFTEILE
Title (fr)
METHODE ET APPAREIL POUR FABRIQUER DES MATIERES PLASTIQUES LENTICULAIRES
Publication
Application
Priority
US 9720105 W 19971105
Abstract (en)
[origin: WO9922931A1] A method and apparatus for producing a lenticular plastic sheet (30) employs a first chill roller (40), a patterned chill roller (42) having a first lenticular pattern thereon, and a second chill roller (48). A plastic sheet (49) is extruded into a first nip (140) between the first chill roller (40) and the patterned chill roller (42) so that the plastic sheet (49) is in contact with the first lenticular pattern, thereby facilitating the formation of a complementary second lenticular pattern on the plastic sheet. A belt (44) is disposed about the first chill roller (40) and the second chill roller (48) to apply force to the plastic sheet (49) in the direction of the patterned chill roller (42), thereby maintaining the plastic sheet (49) in contact with the patterned chill roller (42) to inhibit distortion of the second lenticualr pattern as the plastic sheet cools from being in a molten state to a non-molten state.
IPC 1-7
IPC 8 full level
B29C 43/22 (2006.01); B29D 11/00 (2006.01); G02B 3/00 (2006.01)
CPC (source: EP)
B29C 43/222 (2013.01); B29D 11/00288 (2013.01); G02B 3/0031 (2013.01); G02B 3/005 (2013.01); B29C 2043/463 (2013.01); B29L 2011/0016 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
WO 9922931 A1 19990514; AU 5245698 A 19990524; CA 2308625 A1 19990514; EP 1066152 A1 20010110; EP 1066152 A4 20040825
DOCDB simple family (application)
US 9720105 W 19971105; AU 5245698 A 19971105; CA 2308625 A 19971105; EP 97947355 A 19971105