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Class Information
Number: 493/450
Name: Manufacturing container or tube from paper; or other manufacturing from a sheet or web > Bending > Folding > By direct application of vacuum or fluid
Description: Method or apparatus including (a) application of reduced pressure to certain portions of a sheet or web workpiece so that atmospheric pressure acting on an opposing portion thereof effects the stress to form a crease line in the workpiece; or, (b) application of increased pressure from a flowable medium to effect the stress to form a crease line in the workpiece.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8672823 Napkin folding device Mar. 18, 2014
8506466 Method and apparatus for transporting signatures around a roll without introducing skew Aug. 13, 2013
8439814 Machine and a method for folding nappy/diaper blanks May. 14, 2013
7955244 System for bifolding an absorbent article Jun. 7, 2011
RE42388 Air folder adjuster apparatus and method May. 24, 2011
7931576 Table for a chopper folding device and corresponding chopper folding device Apr. 26, 2011
7878229 Hollow structure plate, manufacturing method thereof, manufacturing device thereof, and sound absorbing structure plate Feb. 1, 2011
7758486 Sheet folding apparatus and method Jul. 20, 2010
7591123 Method for the production of a gas bag packet for an airbag module Sep. 22, 2009
7399266 Method and machine for folding and finishing training pant diapers Jul. 15, 2008
7322925 Apparatus and method for making pre-fastened absorbent undergarments Jan. 29, 2008
7314440 Former for a strip-producing or strip-processing machine Jan. 1, 2008
7270631 Method of tucking side panels with side panel fold location control Sep. 18, 2007
7214174 Apparatus for folding a nonbonded nonwoven web May. 8, 2007
7008363 Apparatus and methods for folding a nonbonded nonwoven web Mar. 7, 2006
7008364 Sheet folding apparatus and method Mar. 7, 2006
6840616 Air folder adjuster apparatus and method Jan. 11, 2005
6821370 Method for positioning garment side panels Nov. 23, 2004
6773387 Vacuum cleaning folding rail Aug. 10, 2004
6726615 Method of folding a gas bag for a vehicle occupant restraint system, a folded gas bag for a vehicle occupant restraint system and a device for performing the method Apr. 27, 2004
6723035 Method of tucking side panels with side panel fold location control Apr. 20, 2004
6723036 Methods and apparatus for folding sheet material Apr. 20, 2004
6685616 Method and apparatus for setting up at least one tool on a tool carrier in relation to format Feb. 3, 2004
6673003 Vacuum cleaning folding rail Jan. 6, 2004
6638202 Bag turning device Oct. 28, 2003
6612974 Adjustable folding station for cards Sep. 2, 2003
6588179 Method and apparatus for packaging an airbag Jul. 8, 2003
6572520 Apparatus for transporting envelope blanks in an envelope making machine Jun. 3, 2003
6514187 Folding and manufacture of pants Feb. 4, 2003
6260330 Method and apparatus for the folding of an inflatable airbag Jul. 17, 2001
5954006 Apparatus for folding a cloth conveyed continuously along a conveying surface of a conveying device Sep. 21, 1999
5921908 Folding device and method for folding flat pieces of laundry in longitudinal direction Jul. 13, 1999
5797831 Vacuum hold down folder/gluers and process Aug. 25, 1998
5782737 Method of folding a vehicle safety airbag Jul. 21, 1998
5779614 Method and apparatus for folding toy balloons Jul. 14, 1998
5730695 Method and apparatus for stacking folded towels and the like Mar. 24, 1998
5729954 Envelope flap opener apparatus Mar. 24, 1998
5716312 Vacuum cylinder Feb. 10, 1998
5624366 Laundry sheet folding apparatus Apr. 29, 1997
5556360 High production folder construction Sep. 17, 1996
RE35265 Bag folding system Jun. 4, 1996
5435802 Folder construction Jul. 25, 1995
5360387 Bag folding system Nov. 1, 1994
5299793 Multi-panel refolding transfer system with rotating transfer clamp Apr. 5, 1994
5300007 Folder construction Apr. 5, 1994
5197722 Cloth folding device with airblower for uncurling ends Mar. 30, 1993
5162035 Bag folding system Nov. 10, 1992
5094658 Vacuum side-folder section for envelope blank folding apparatus Mar. 10, 1992
5045044 Method and device for folding a paper web Sep. 3, 1991
5015317 Method and apparatus for making a multi-cellular collapsible shade May. 14, 1991

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