Class 83/137 - Fluid pressure actuated stripper

Subclass of Class 83 - Cutting
Definition: Device in which the stripper is actuated by means applying
No. of patents: 38
Last issue date: 09/18/2007

Number	Title	Issue Date
7270042	Paper punch apparatus A paper punch apparatus comprising a flange-storing space for storing the flange portion in an elevating unit, an insertion/removal portion for insertably supporting a supporting axis of a bit reception plate in communication with the flange portion, and a bit-recep...	09/18/2007
7222702	Gas spring A gas spring (7) comprises a cylinder main body (20); a rod member (21) slidable to cylinder main body; a gas filled chamber (23) filled with compressed gas and urging the rod member in a first direction; a rod inserting hole (32) ...	05/29/2007
7093526	Forming die apparatus A method of manufacturing a billet for cold forging according to the present invention is characterized by the first spheroidizing annealing step of spheroidizing a carbide in a blank, the drawing step of drawing the blank at a predetermined sectional area reduction...	08/22/2006
7080585	Hold-down clamp for slitter-punch A clamping arrangement is provided for a slitter and/or hole punch for a plastic film processing machine. The punch can be unitarily formed on a base member, and mounted on a block that is affixed to the end of an actuator rod. A double-acting pneumatic cylinder act...	07/25/2006
7065854	Abutting clinch-joining method An in-expensive method to join metals or other materials by a slug that is compressed or clinched into a punched or machined substantially rectangular slot in two adjoining pieces. The final assembly is flat and of the same thickness as the clinched material. It cou...	06/27/2006
6979153	Deep-grooving insert having stepped cutting edge A deep-grooving chip-forming cutting insert includes a rear mounting portion, a front cutting portion, and a pair of side walls, each side wall extending along the front and rear portions. The front cutting portion includes a front end surface, a top surface, and a ...	12/27/2005
6964225	Press A press, especially a precision cutting press, for producing precision cut parts from a metal strip or a preform by means of a tool, which is fixed to a top tool clamping plate and a bottom tool clamping plate, wherein a tappet is allocated to one of the tool clampi...	11/15/2005
6240818	Precision blanking press with knife-edged ring and counter cylinder The press slide of a hydraulically or mechanically driven precision blanking press is non-positively connected with a crosshead by means of columns. The knife-edged ring cylinder is integrated in the crosshead and the supporting force of the knife-edged r...	06/05/2001
5996456	Punching apparatus An apparatus for punching transversely throughgoing coaxial holes in spaced walls of a workpiece has a holder supporting the workpiece and an outer tool part formed with a pair of transverse bores and displaceable between an advanced position engaged over...	12/07/1999
5802944	Gas cylinder with internal time delay A gas cylinder with internal time delay which is entirely self contained within the cylinder. A valve pin that controls communication between the two sides of the piston through one or more a one-way valves in the piston. As each piston is moved by a die ...	09/08/1998
5692423	Vibration finishing method and apparatus for same A vibration finishing method and apparatus in which the surface roughness and form of a hole in a compound material such as a printed board can be made excellent and the working accuracy of the hole can be significantly improved and the working cost of th...	12/02/1997
5662016	Punching die A punching die includes a punch body, a punch guide fitted on the punch body movably up and down with respect to the punch body, a punch head provided on a top portion of the punch body, and a gaseous spring provided between the punch body and the punch g...	09/02/1997
5553524	Stripper device and punch assembly using same A stripper device for a punching tool comprises: a gas cylinder (5) filled with a gas (7) having a cylinder head (27) and a cylinder end (17) attached to a lower end of the cylinder head airtightly; and a piston (9) having a punch head (11) and a piston r...	09/10/1996
5546839	Pneumatic ejector A pneumatic ejector comprises a rigid support member having a base portion and an upstanding boss integral with the base portion, and an elastomeric ejection element having a diaphragm portion and a skirt portion surrounding the diaphragm portion and secu...	08/20/1996
5460067	Continuous cycle mechanical architecture able to simultaneously block and cut layers of any non-rigid materials A device for performing the continuous cutting of materials of any form and nature, provided they are stratified and not flexionally rigid. The device generally comprises: fixed and mobile support surfaces; a mobile cutting shear cooperating with a fixed ...	10/24/1995
5267496	Tire cutting apparatus A hydraulically actuated tire cutter includes a first conveyor belt which loads a tire into a tire cutting position between a fixed plate, a moving plate and a plurality of adjustable bars. Twelve corresponding pairs of gripping jaws project from the fixe...	12/07/1993
5253559	Device and system for piercing printed circuits A first tool assembly includes a punch holder assembly and a circuit board clamp and a second tool assembly includes a die for receiving punches held and driven by the punch holder assembly. A circuit board has holes formed by the punches and is clamped b...	10/19/1993
5247862	Process for producing burr-free workpieces by blanking, in particular in a counterblanking tool The present invention relates to a process and a device for producing burr-free workpieces by blanking using a counterblanking tool. The counterblanking tool has an upper tool and a lower tool which include respectively an upper blanking die and a lower b...	09/28/1993
5054353	Blanking press A precision blanking tool mounted in a press, which may be a transfer press, comprises an upper part with an upper tool support and a lower part with a lower tool support. One hydraulic unit is accommodated in the upper part of the precision blanking tool...	10/08/1991
4934230	Die stamping system A die stamping system includes opposed die members which clamp a metal workpiece to be shaped, cut or pierced after which the die members are moved away from one another and a part is subsequently ejected wherein the ejector is controlled for a selected d...	06/19/1990
4905556	Blanking press A precision blanking tool mounted in a press, which may be a transfer press, comprises an upper part with an upper tool support and a lower part with a lower tool support. One hydraulic unit is accommodated in the upper part of the precision blanking tool...	03/06/1990
4823658	Punch presses An improved punch assembly (10) for a punch press comprises a main piston (13) driving a punching tool (11) and an auxiliary piston (17) which can be selectively enabled to cooperate with the main pisto1 (13) in a high force, slow speed mode or disabled t...	04/25/1989
4791844	Knockout device for punching a work plate in a press-machine In a knockout device which is mounted in a press-machine in order to knock out a punched work plate such as a printed board and the likes from punches through a knockout actuation-plate, cylinder chambers as an oil hydraulic knockout cylinder is formed in...	12/20/1988
4646599	Hydraulic punch press with workpiece stripper A punch press having a hydraulic actuator for extending and retracting the ram, a stripper sleeve coaxial with and guidably engaging the ram, and a hydraulically operated clamp encircling the stripper sleeve and normally in a release condition guidably en...	03/03/1987
4631996	Punch press with self-adjusting stripper A punch press having a self-adjusting stripper member is disclosed whereby stripping of the press punching tool from a workpiece is automatically effected attendant to effecting a return stroke of the press actuator. The construction includes a press fram...	12/30/1986
4611483	Press and method of making same A metal working press having a base, a die set located over the base, and coaxial primary and secondary rams movable towards and away from the base to drive the die set through a working stroke and return it to an open condition. The die set includes uppe...	09/16/1986
4602541	Punch press with means for rotating the workpiece and method of using same and tooling therefor A punch press which has an X-Y guidance system for moving the workpiece relative to the workstation also includes means for rotating the workpiece on the worktable upon release of the workpiece from the X-Y guidance system. In this fashion, the workpiece ...	07/29/1986
4593552	Butt shear with butt knocker An extrusion press is provided with a butt dislodging apparatus for removal of a billet butt from an extrusion die with the dislodging apparatus including an elongated butt knock-off bar having a free end which is movable within proximity to a butt shear ...	06/10/1986
4524660	Pneumatic-hydraulic driving device for the knockout mechanism associated with the slide of a press-machine An improved pneumatic-hydraulic driving device for the knockout mechanism associated with the slide of a press-machine wherein the device serves to actuate the knockout mechanism in a controlled manner to provide cushioning motion during punching of the w...	06/25/1985
4516448	Punch and ram assembly for punch press A punch and ram assembly for a punch press which clamps a workpiece prior to punching with the same mechanism used to strip the workpiece from the punch as the punch is retracted. The elements of the clamping and stripping mechanism are carried and actuat...	05/14/1985
4474565	Blank stripping apparatus for rotary die cutters Improved blank-stripping apparatus for rotary die cutters of the type which have a die cutting roll, and an anvil roll for supporting paperboard blanks against a cutting rule on the die cutting roll, includes a rotary-cam-timed valve system pressure-actua...	10/02/1984
4373413	Punch press apparatus for placement and alignment of a knife holder In apparatus for the placement and alignment of punch knives mounted in a knife holder on a punch press, a first swivel arm is pivotally supported at one end on a support for pivotal movement about a vertical axis. A second swivel arm is supported on the ...	02/15/1983
4332179	Combined punch retainer and fluid-actuated stripper A vertically oriented cylinder has a punch retainer firmly secured to its lower end. The piston within the cylinder has several legs which extend downwardly through and below the retainer. A stripper plate secured to the lower ends of the legs of the pist...	06/01/1982
4316399	Combined punch retainer and fluid actuated stripper A punch retainer is formed with a bore in its upper portion for releasably securing a punch therein. The lower portion of the punch retainer is formed as a cylinder for a vertically movable stripper piston. The portion of the cylinder above the piston is ...	02/23/1982
4292869	Unitary punch and die assembly A unitary punch and die assembly wherein the stripper spring for the punch comprises a fluid cylinder which communicates with a gas reservoir formed integrally with the punch and die holder and which is adapted to be charged with gas to a predetermined pr...	10/06/1981
4068520	Cam actuated ejector mechanisms for presses A hydraulically actuated ejector mechanism is mounted on a press bed and includes a pair of opposed cams connected to the press slide for vertical displacement therewith. The cams actuate corresponding followers in the form of hydraulic pistons which oper...	01/17/1978
4043236	Device for transforming a single pressure force into separate pressure forces A process and device for transforming a single pressure force into separate pressure forces in the processing of material, especially for energizing a punch and a stripper when holes of small dimensions are punched in material which is relatively thick wi...	08/23/1977
4022089	Container trimming apparatus Apparatus is disclosed for trimming the flange of a drawn metal container such as a food or beverage container so as to place it in condition for having the lid applied thereto. The apparatus includes a fixed trim punch secured to the base of a press, wit...	05/10/1977

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Class 83/137 - Fluid pressure actuated stripper