Paper cup and its manufacturing process
OwnerJiaoping Dinginventor
Life of this patent
Estimating the term…
Abstract
The present paper cup comprises a cup body, and the cup body comprises inner paper and outer paper. There are hollow bulges on the outer paper, and the outer paper forms a connecting part. The inner side of the connecting part bonds to the outer side of the inner paper, and the cup rim of the outer paper extends to the cup rim of the inner paper. In addition, the outer side of the cup rim of the inner paper bonds to the inner side of the outer paper, and both cup rims of the outer paper and the inner paper bend outward to form a double layered crimping. The manufacturing process for the present paper cup includes: paper preparation, rolling, composition, sheet cutting, forming, molding and etc.
Claims6
A method of manufacturing paper cups, the method comprising:
- winding a paper sheet of 100 grams per square meter to 170 grams per square meter into an outer paper reel (12);
- winding a paper sheet of 100 grams per square meter to 170 grams per square meter into an inner paper reel (11);
- unwinding the outer paper reel (12) to roll embossed patterns onto an inner side of an unwound paper sheet of the outer paper reel (12) to form a rolled outer paper sheet;
- unwinding the inner paper reel (11) and bonding a first side of the rolled outer paper sheet to a first side of the inner paper (11) to form a double layered paper (9), such that the embossed patterns on a second side of the unwound paper sheet of the outer paper reel (12) form hollow bulges (121) in the double layered paper (9);
- die cutting the double layered paper (9) into fan-shaped cup sheets (2) with two opposite straight edges and two opposite arc edges;
- winding each of the cup sheets (2) into a cup body (1) that is generally cylindrical with a diameter tapering from a cup top to a cup bottom (4) of the cup body (1);
- bonding the two straight edges of each of the cup sheets (2);
- bending a cup rim of the double layered paper (9) outward to form a crimp (3) with an annular cross section;
- bending a bottom rim of the cup body (1) inward;
- and
- adhering the bottom rim of the cup body (1) to an inner side of a supporting flange (41) of the cup bottom (4) by hot pressing.
Dependencies are inferred from the claim text.