The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 1982
Filed:
Jan. 11, 1979
Morton Gilden, Baltimore, MD (US);
Maryland Cup Corporation, Owings Mills, MD (US);
Abstract
A method and apparatus are provided for forming two-piece drinking cups and containers from conventionally shaped arcuate sidewall blank and bottom blanks of filled polypropylene sheet material or polypropylene-polyethylene copolymer sheet material with approximately 40% talc or calcium carbonate as a filler. The arcuate blanks for the sidewall and the bottom blanks are run through relatively standard two-piece container or cup making machinery utilizing patterned air jet heating means to heat areas of the filled plastic sheet material such that the sidewall and bottom curl seams can be heat sealed on the forming mandrels of the machinery and the top curl can be placed in the container by heating and substantially conventional forming dies. The seaming structures so produced are extremely water tight and of high strength characteristics.