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Patent Searching and Data


Title:
FORMING PROCESS FOR FLAP OF PAPER VESSEL
Document Type and Number:
Japanese Patent JPH01281925
Kind Code:
A
Abstract:

PURPOSE: To form surely and effectively the pasting flap of an envelope by forming the flap when the paper vessel excellent in aroma-keeping and gas barrier characteristics is made so as not to expose the end surface of a laminated sheet onto the inner peripheral surface of the vessel.

CONSTITUTION: Flame treatment is respectively applied to the rear surface layer of about 20mm width containing the resin layer 1B for heat seal in the other side part 7 of a laminated sheet 6 whose end surface has been treated, the surface of the resin layer 1A for heat sealing of one side part 5 and the part of about 10mm width of the surface of front layer 4 of the part beyond a turning over-part. These flame treated parts are brought in contact with each other, and after the overlapping of said side parts has been formed, this overlapping is pressed with a rubber roller, and stuck parts B, C are formed, whereby the cylindrical body wherein the rear surface layer 3 of a laminated layer 6 constitutes an inner peripheral surface-layer, is obtained. By this process, the flap may be formed very effectively and surely.


Inventors:
YAMADA KAZUKI
TSUNODA HIROTAKA
Application Number:
JP1988000111940
Publication Date:
November 13, 1989
Filing Date:
May 09, 1988
Export Citation:
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Assignee:
DAINIPPON PRINTING CO LTD
International Classes:
B31B50/64; B32B27/28; B32B27/32; B65D3/22; (IPC1-7): B31B1/64; B32B27/28; B32B27/32