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Class 72/333 - With endless cutting edges (e.g., for punching a hole)


Subclass of Class 72 - Metal deforming
Definition: Subject matter wherein the shearing edge on each of said
No. of patents: 52
Last issue date: 04/20/2010


1    
NumberTitleIssue Date
7698924Member having a chamfered through hole and manufacturing method of the same
A method of forming a chamfered through hole having a chamfered portion at each end thereof by: forming a prepared hole in a plate-like portion; forming a first chamfered portion by driving a first punch; forming a second chamfered portion by driving a second punch,...
04/20/2010
7490501Method of processing formed product, and metal cope and metal drag used for the method
A method is provided for processing a product formed by a punch press. The method includes leaving a micro joint connecting a workpiece to a raw material forming the product when forming a slit in the workpiece along an outer shape of the raw material. The method al...
02/17/2009
7360388Hollow stepped shaft and method of forming the same
A hollow stepped article is formed from a solid blank to reduce the material cost, and cracking is prevented in a stepped portion of large diameter when a portion of the blank is deformed by its radial expansion. A hollow stepped shaft is formed by holding an upper ...
04/22/2008
7308814Method for perforating a sheet
A method for perforating a sheet (1) with the aid of a stamp (3) and a matrix (2) is described, the sheet (1) being elongated before the hole punching in accordance with the setpoint diameter in the hole boundary area through bulging of t...
12/18/2007
7249484Method for manufacturing a liquid ejection head
There is provided a first die, in which a plurality of projections are arrayed in a first direction with a fixed pitch to form at least one array of the projections. Each of the projections is elongated in a second direction perpendicular to the first direction. The...
07/31/2007
7172483Method of making metallic shell for spark plug, method of making spark plug having metallic shell and spark plug produced by the same
A method of making a metallic shell for a spark plug. The metallic shell includes a multi-stepped through hole, an intermediate tubular portion, a tip end side tubular portion and a base end side tubular portion. The through hole includes a large diameter hole secti...
02/06/2007
7171837Hollow stepped shaft and method of forming the same
A hollow stepped article is formed from a solid blank to reduce the material cost, and cracking is prevented in a stepped portion of large diameter when a portion of the blank is deformed by its radial expansion. A hollow stepped shaft is formed by holding an upper ...
02/06/2007
7165433Method of manufacturing a chamber plate for a liquid ejection head
There is disclosed a method of manufacturing a chamber formation plate of a liquid ejection head. The chamber formation plate includes a first region formed with at least recess portions to be pressure generating chambers communicated with nozzles from which liquid ...
01/23/2007
7165812Side plate with integral boss
A side plate according to the invention includes a main body, a first cup-shaped feature formed of the main body, and a second cup-shaped feature formed of the first cup-shaped feature, wherein the second cup-shaped feature has a diameter smaller than the first cup-...
01/23/2007
7108649Packaging for a storage medium in particular for a cd
The invention relates to a method for the production of a packaging for a CD-like storage medium, by means of a lower die, with a recess and an upper die with a working stamp corresponding to the recess. The invention further relates to the following method steps—...
09/19/2006
7104102Bending machine for profiles such as reinforcement round pieces or similar
Bending machine (10) to obtain shaped elements from pre-cut profiles (11), equipped with a drawing assembly (14) which draws the profiles (11), first shearing means (13) arranged downstream of the drawing assembly (14) and b...
09/12/2006
7100415Method and apparatus for manufacturing a liquid ejection head
A metallic plate member having at least one through hole to be a part a common liquid reservoir of a liquid ejection head is provided. In a first die, a plurality of first projections are arrayed in a first direction with a fixed pitch. Each of the first projections...
09/05/2006
7082805Manufacturing method for cylindrical part
It is an object of the present invention to provide a method of manufacturing a cylindrical part with a thin-walled portion at a lower cost, and according to the manufacturing method of the present invention, a base metal formed with thin-walled portion adjacent to ...
08/01/2006
7055353Progressive stamping die
A progressive stamping die system and method of operation providing dimensionally accurate flat stamped parts. A biasing mechanism is provided in actual alignment with a coin punch member in order to accurately control the configuration and planar accuracy of the st...
06/06/2006
7021112Manufacturing method for metal design panel
A metal design panel is constituted by a surface decorative member and a thermoplastic resin member, which are firmly and integrally combined together. A plurality of through holes or dimples are formed at prescribed positions of a metal plate panel, which serves as...
04/04/2006
6908272Threaded fastener nut with anti-cross threading radiused features and tactile feedback features
A fastener nut is formed with anti-cross threading features that include a rounded or chamfered edge at the entry end to the nut, followed by an unthreaded cylindrical counterbore that extends axially from the entry end to the threaded section of the bore. The round...
06/21/2005
6698939Method for processing an insert pipe for use in injection molding
A number of holes (3) are formed in the outer circumferential wall (2) of a tubular metallic pipe (1) at regulator intervals in both circumferential and axial directions. Each of the holes (3) consists of a polygonal opening (4) and raised pieces (5) form...
03/02/2004
6606895Method of manufacturing a crown-shaped component
Described is a method of manufacturing a crown-shaped component 3 having a plurality of axially extending protrusions 2 which are formed at an end of a cylindrical portion 1. The method comprises the steps of: upsetting the cylindrical portion into a cyli...
08/19/2003
6378350Seat belt anchorage plate for seat belt device and method for manufacturing the same
A seat belt anchorage plate for a seat belt device formed with a plate shaped member (base) 2 is provided with a slot 6 into which a belt (waist belt) 13 is inserted and which has long edge parts opposed with each other. The belt 13 is folded back along t...
04/30/2002
6295842Uniform distribution quenching of formed glass sheets
A glass sheet quench unit (22) and method for quenching formed glass sheets by quench gas jets (40) that define a uniformly repeating gas jet impingement pattern (44) that is an equilateral triangular pattern providing uniformly repeating quench cells (46...
10/02/2001
6253594Method of producing a stamped item
A method of forming a hollow, bullet-shaped article having a strap extending across the normally closed end. The method includes the steps of drawing a metal blank into a cylindrical cup, piercing the bottom of the cup in at least two locations to form a ...
07/03/2001
6230541Cardcage for circuit cards
The present invention provides an improved cardcage design. The improvements result from the formation of an integral cardcage side using a construction method involving precision punched sheet aluminum that is precision formed into final configuration. T...
05/15/2001
6101859Die assembly for forming a pattern on a metal plate
A one-piece metal plate has an open mesh-like pattern, a plurality of identical rectangular perforations arranged at regular intervals in parallel rows, a plurality of identical rectangular embossed parts arranged at regular intervals and bridging the row...
08/15/2000
6066048Punch and die for producing connector plates
A blade punch for forming teeth in a connector plate, the blade punch comprising an elongated blade having a metal working tip at one end and a shank at the other end. The blade has an elongated cross-section defined by opposing parallel spaced planar sid...
05/23/2000
5896773Window/door frame bar processing punch press
A frame bar processing punch press having a bottom die holder holding a bottom die, and an upper die holder holding an upper die, the upper die holder being driven by a reciprocating rod to strike the upper die against the workpiece carried on the bottom ...
04/27/1999
5749256Method and apparatus for manufacturing a hot rolled beam
A method of manufacturing a one piece integral metallic beam (22) having flanges (24), and a web (26) joining said flanges, the beam having been hot rolled from a heated metal workpiece (20) to produce an integral one piece beam having flanges and a web e...
05/12/1998
5678444Method of sequentially manufacturing hollow knock pins
A method of sequentially manufacturing a hollow knock pin avoids distortion due to the large forces of shearing. A rounded corner of a deep-drawn cup shape is supported closely both on the inside radius and on the outside radius by curved walls matched to...
10/21/1997
5658112Process for manufacturing a single component cover for oil filters for vehicles
There is described a process for manufacturing a single-component cover (10) for filters for vehicles substantially comprising the steps of: providing a starting single-component slab (10); drawing the slab (10) in the central part (34) thereof; reducing ...
08/19/1997
5492001Method and apparatus for working burred portion of workpiece
The periphery of a workpiece which has already been subjected to burring is at least partially punched by a periphery punch and a periphery die. The burred portion is then further pressed by the periphery punch and a die surface including an annular porti...
02/20/1996
5448832Method of forming a boss on a plate-like metallic blank, and method of forming a pulley from a metallic plate
The present invention is adapted to form, at the center of a plate-like metallic blank, a case-like boss projecting from one lateral side of the blank, by: curving the plate-like metallic blank such that the blank is convex punching a hole in the top of t...
09/12/1995
5412972Method of making a gasket
The gasket and method of the present invention can be used for creating thinner surfaces on structures, including gaskets, without necessarily damaging such structures during formation, and without the need to resort to the undesirable practice of chemica...
05/09/1995
5349841Feeding apparatus for metal belting and manufacturing apparatus for fins of a heat exchanger
A feeding apparatus for a metal belting has a basic plate being capable of supporting the metal belting, which has a plurality of through-holes in a feeding direction. The basic plate has slit formed in the feeding direction and a plurality of traveling p...
09/27/1994
5245850Process of producing an outer joint part
A process of producing an outer joint part formed in a non-chip forming way from a plate metal member and having circumferentially distributed, outwardly formed ball tracks. In one or several connected process stages, a plate metal bar is formed into a ro...
09/21/1993
5237849Method of manufacturing fins for heat exchangers
The present invention provides a method of manufacturing fins for heat exchangers, wherein a collared through-hole of a prescribed height can be easily formed while using volatile oils as machining oil, even if the material of the metal plate is thinner a...
08/24/1993
5235881Piercing die whose punch has different amounts of chamfer at different outer peripheral edge portions
A piercing die including a punch and a die cooperating with each other to effect a piercing operation on a metallic workpiece sheet, the punch having an outer peripheral edge having a closed profile at a working end thereof. The outer peripheral edge of t...
08/17/1993
5179853Method to manufacture sealing nipples or plugs
The method to manufacture sealing nipples or plugs comprises a cutting process of a disk-shaped element from a metal sheet followed by drawing of the disk to obtain a hollow element of cylindrical shape, closed at one end by a cap, and then pressing the h...
01/19/1993
5136905Device and method for forming a gasket hole
A gasket punch and method for forming a gasket hole. The gasket punch is a single piece having a spherical head and a handle whereby the punch may be used to form gasket holes of various sizes up to the spherical head diameter with the gasket material on ...
08/11/1992
5088311Method of making a tubular member
In a method of making a metallic shell for a glow plug, a columnar blank is extruded to have an enlarged recess on the upper end surface of the blank so as to make an upper tubular portions, while extruded to have an enlarged recess on the lower end surfa...
02/18/1992
5054305Multiple function hydraulic apparatus
An apparatus for performing mechanical operations such as piercing, punching and forming on a workpiece wherein the apparatus includes a carrier, a ram mounted for reciprocal movement on the carrier, a first fabricating tool mounted on the ram, a piston a...
10/08/1991
5016461Method and apparatus for stamping weld adapters
A progressive die apparatus and method for cold forming weld adapters. A progressive die apparatus, preferably having at least four working stations and several idle stations, is used to form, weld adapters from rectangular bar stock having a thickness of...
05/21/1991
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