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...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.

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Class 72/259 - By plural impellers operating into one extrusion chamber


Subclass of Class 72 - Metal deforming
Definition: Method or means in which the squeezing means comprises a
No. of patents: 12
Last issue date: 12/26/2006


NumberTitleIssue Date
7152448Continuous equal channel angular pressing
An apparatus that continuously processes a metal workpiece without substantially altering its cross section includes a wheel member having an endless circumferential groove, and a stationary constraint die that surrounds the wheel member, covers most of the length o...
12/26/2006
7108823Staged compression molding process
A process of molding a container closure comprises depositing a gob of thermoplastics material in a mold cavity and then moving mold plates in an upper mold portion relative to an opposing lower mold portion to form the container closure in the mold cavity. ...
09/19/2006
6865919Method and apparatus for producing a refined grain structure
The apparatus for operating on a workpiece includes a die defining first and second apertures and an interior therebetween. The first aperture and the interior of the die are structured to receive the workpiece. The interior of the die can be structured to shape the...
03/15/2005
5475999Die-lateral extruding method and apparatus
An axially non-symmetric article is forged by the first upsetting by means of the first and second punches and by the second die-lateral extruding of a metal bar stock which is extruded via an orifice into an extension space(s) which has a greater cross s...
12/19/1995
5335527Method and apparatus for manufacturing a composite metal wire by using a two wheel type continuous extrusion apparatus
A two wheel type continuous extrusion apparatus has two rotary wheels having grooves receiving covering material rods, a fixed shoe block arranged therebetween and an abutement receiving a core metal wire. Covering material inlet apertures are provided fo...
08/09/1994
5000025Extrusion machinery
A two wheel conform type aluminum extrusion machine and a die assembly and subassembly for extruding tubing and/or cladding a core material. The die subassembly permits lateral adjustment of a die ring relative to a mandrel to assure uniform wall thicknes...
03/19/1991
4703642Process and device for manufacturing a section, in particular a hollow section, via extrusion
A process and device for manufacturing a section, in particular a hollow section, especially from light metal billets. To this end a plurality of billets is simultaneously forced through the shape-giving cross-section of a die and united to form the matri...
11/03/1987
4635460Apparatus for and method of the plastic forming of materials
Method of plastically deforming a body of malleable solid material between male and female dies which are forcible pressed together. The material is subjected to repeated identical pressing cycles; in each pressing cycle the force between the dies is conc...
01/13/1987
4536938Process for the continuous production of solid alkali metal strands
A process is described for the production of solid alkali metal strands, whereby molten alkali metal is introduced to an extrusion apparatus and is continuously cooled down as the metal travels along a section of the extrusion apparatus by means of a worm...
08/27/1985
4208898Process and device for extruding a plurality of composite sections
A process and device for carrying out the process allows for the extrustion of composite sections comprising a beam-like section made of a light metal and at least one insert made of another metal which provides a facing on at least one surface of the bea...
06/24/1980
4173136Method and apparatus for producing multiple groove V-belt pulleys
A multiple groove pulley is formed from a cup-shaped blank by an apparatus and method in which axially displaceable segmental shaping rings are positioned at axially predetermined positions along the wall of the blank. Fluid pressure communicated to the i...
11/06/1979
 
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