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Class Information
Number: 29/21.1
Name: Metal working > Means for forming clench-tongue (e.g., for tieband)
Description: Apparatus, including a punch for cutting out a flap from a sheet metal work portion, and including means to bend the flap to engage and secure plural portions in assembled relation.

Patents under this class:

Patent Number Title Of Patent Date Issued
8240678 Connecting structure of metal plates Aug. 14, 2012
7322086 Method of attaching a functional element; die; functional element; component assembly Jan. 29, 2008
6446407 Grid tee with integrally stitched web Sep. 10, 2002
6041564 Clinched double web grid tee Mar. 28, 2000
5992206 Clinching die having metallic restoring member Nov. 30, 1999
5946782 Tool for making joints between sheet-formed members Sep. 7, 1999
5884405 Method and tool for joining sheet metal structures Mar. 23, 1999
5617619 Rivet fastening apparatus and method Apr. 8, 1997
5509290 Tools for cold flow forming of assembly points in sheet metal Apr. 23, 1996
5490310 Apparatus and method for forming a clinch joint Feb. 13, 1996
4928388 Single station hemming tooling May. 29, 1990
4928370 Tool set for connecting superposed sheet metal work pieces May. 29, 1990
4905362 Clinching tool Mar. 6, 1990
4856316 Apparatus for forming joints Aug. 15, 1989
4827595 Method for hemming overlapped sheet material May. 9, 1989
4825525 Clinching tool May. 2, 1989
4825519 Machine for making awnings May. 2, 1989
4760632 Method and apparatus for joining plates by stamping pressing and swaging dies Aug. 2, 1988
4752993 Fastener and method of attachment to sheet material Jun. 28, 1988
4688316 Method of making hollow integral rivet in components Aug. 25, 1987
4658502 Sheet metal joining apparatus Apr. 21, 1987
4611381 Method of joining two or more pieces of malleable material Sep. 16, 1986
4607418 Means for interlocking overlapping sheet material Aug. 26, 1986
4571975 Fluid actuated tool Feb. 25, 1986
4534092 Apparatus for joining lengths of metal strip Aug. 13, 1985
RE31737 Adjustable die and punch for sheet material fastening machines Nov. 20, 1984
4465740 Decorative medallion and method and machine for manufacture Aug. 14, 1984
RE31535 Spot clinch means and method Mar. 13, 1984
4403409 Fastening apparatus and control systems therefor Sep. 13, 1983
4394794 Metal fastening system and method Jul. 26, 1983
4391037 Apparatus for joining thin metal strips end-to-end Jul. 5, 1983
4312122 Apparatus and method for forming an electrical switch assembly Jan. 26, 1982
4208776 Punch, die and anvil set Jun. 24, 1980
4184396 Locking joint manufacture Jan. 22, 1980
4056870 Hand held powered metal clinching tool Nov. 8, 1977
4041600 Method of assembling storage system Aug. 16, 1977
4042097 Storage system Aug. 16, 1977
3934327 Method of interlocking overlapping sheet material Jan. 27, 1976

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