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Class Information
Number: 493/474
Name: Manufacturing container or tube from paper; or other manufacturing from a sheet or web > Tool or tool support > Expandable or collapsible
Description: Method or apparatus wherein the means for engaging the workpiece or the means partaking of all motion of such workpiece engaging means is, in each operation, enlarged or reduced in size to present its surfaces for workpiece engagement.

Patents under this class:

Patent Number Title Of Patent Date Issued
8246844 Method for folding a filter bag and a folded filter bag arrangement Aug. 21, 2012
6254523 Method of imparting directional permanency of folding to sheet, and apparatus therefor Jul. 3, 2001
5830120 Apparatus for adjusting the folding jaws of a folding jaw cylinder Nov. 3, 1998
5417641 Device for folding articles May. 23, 1995
5256129 Box forming apparatus with extensible wing elements Oct. 26, 1993
5072573 Apparatus with adjustable width trays for automatic packaging machines Dec. 17, 1991
5024641 Programmable dynamically adjustable plunger and tray former apparatus Jun. 18, 1991
4988331 Programmable dynamically adjustable plunger and tray former apparatus and method of adjusting Jan. 29, 1991
4820249 Multiple seam forming apparatus for continuously running webs Apr. 11, 1989
4804356 Apparatus for processing baglike container blanks Feb. 14, 1989
4674998 Forming assembly for automatic machines for forming boxes from semi-finished flat blanks Jun. 23, 1987
4642084 Plastic bag making machine Feb. 10, 1987
4619636 Method and apparatus for manufacturing container having bellows bottom and lid Oct. 28, 1986
4571233 Paper container bottom expander Feb. 18, 1986
4496338 Folding blade cylinder Jan. 29, 1985
4330289 Apparatus for manufacturing a lined container May. 18, 1982
4302275 Apparatus for forming tubular plastic sleeves for application to bottles Nov. 24, 1981
4285684 Head for slitter-corrugator Aug. 25, 1981
4006671 Corrugator Feb. 8, 1977

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