Patent ID: 7886792
Filing Date: 2011-02-15
Classification: B32B

Abstract:
1. A sheet laminating apparatus with a jamming-detection mechanism for laminating a sheet article between a first plastic film and a second plastic film, said sheet laminating apparatus comprising: a transfer passage including an entrance zone, a laminating zone and an exit zone; a first roller and a second roller respectively disposed on an upper side and a lower side of said laminating zone, wherein said sheet article is laminated between said first plastic film and said second plastic film and transmitted from said laminating zone to said exit zone when said first roller is rotated in a first direction and said second roller is rotated in a second direction, and said first plastic film, said sheet article and said second plastic film are transmitted from said laminating zone to said entrance zone when said first roller is rotated in said second direction and said second roller is rotated in said first direction, in which said first direction is opposed to said second direction; a first sensing element disposed between said laminating zone and said exit zone and beside said first roller and including a first light source for generating a first light beam and a first light receiver, wherein said first light beam is projected on said first roller if said first plastic film transported across said laminated zone is not adhered on said first roller, and said first light beam is projected on and reflected by said second plastic film to generate a first reflective light beam if said first plastic film transported across said laminated zone is adhered on said first roller, wherein said first reflective light beam is received by said first light receiver and converted into a first sensing signal; and a control unit electrically connected to said first sensing element for controlling said first roller to rotate in said second direction and controlling said second roller to rotate in said first direction in response to receipt of said first sensing signal.