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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7360385 | Quick change bend tooling bolster A tube bending assembly adapted for use with a rotary draw bender, and preferably including a bend die mounting unit for securing a plurality of stacked bend dies drivenly coupled to the bender, a bend die tower unit for structurally supporting the bend die mounting... | 04/22/2008 |
| 7251976 | Apparatus and method for the noncircular bending of tubes A tube bending apparatus adapted for the noncircular bending of a tube includes a modified bend die, a modified wiper die, a translatable and pivotable element and an actuator. The bend die presents a noncircular bending profile having a linearly or nonlinearly incr... | 08/07/2007 |
| 7234333 | Machine for bending rod-shaped or tubular workpieces On a machine for bending rod-shaped or tubular workpieces, which includes a bending head having a bending mandrel mounted on a rotational axis and rotatable by means of a rotary drive, and having a clamping device for pressing the workpiece to be bent against a form... | 06/26/2007 |
| 7181947 | Bending machine with a compact bend arm A bending machine with a compact bend arm includes in a bend arm (4) being mounted on a rotating spindle (3) a cylinder which is fed with a pressured fluid through hoses (7) being part of a hydraulic circuit connected to a source of pressured fl... | 02/27/2007 |
| 7171835 | Bending apparatus A bending apparatus which can bend pipes and obtain as small curvature as possible without flattening or buckling easily occurring in the bending region. The bending apparatus comprises a bending die for a pipe, a clamping die which rotates together with the bending... | 02/06/2007 |
| 7171834 | External sleeve assisted tube bending A method and apparatus for bending tubes particularly suited for bending thin-walled tubing into a tight radius bend. An external sleeve is used during the bending process which maintains the tube cross sectional area and tube wall thickness, thereby eliminating the... | 02/06/2007 |
| 7150172 | Burring device A burring device is provided which can efficiently perform continuous burring. The burring device has a work holder which has a burring hole and which holds a work object, a pusher rod which rotatably supports the base end of a metal core which has a processing part... | 12/19/2006 |
| 7150175 | Clamp assembly for bend arm of tube bending machine A clamping assembly for use with a bend arm of a tube bending machine. The assembly comprises a force multiplier linkage that applies a controlled and variable force to a workpiece. In one embodiment, the force multiplier linkage comprises a bearing member pivoted b... | 12/19/2006 |
| 7143618 | Method of making pre-formed tubular members A method of making a pre-formed tubular member includes the steps of providing a tubular member extending longitudinally and providing a bending assembly having a mandrel with at least one ball and a bending die. The method also includes the steps of positioning the... | 12/05/2006 |
| 7140224 | Moderate temperature bending of magnesium alloy tubes A method for bending magnesium alloy tubes. The method includes heating the tube at moderate temperature in the range of about 100° C. to 200° C., and bending the tube to a bend angle or forming the tube to a desired shape. ... | 11/28/2006 |
| 7134310 | Tube bender A tube bender includes a worktable, a rail on the worktable, a tube-pushing device and a tube-bending device. The tube-pushing device is positioned on the worktable, having a moving base and a clamper at one side of the moving device. The clamper clamps a tube being... | 11/14/2006 |
| 7131313 | Bending method and mandrel of multi-layered pipe A method where an inside mandrel is inserted into the inner pipe of the multi-layered pipe, a tubular outside mandrel is inserted into the annular space between the inner pipe and outer pipe, the multi-layered pipe is clamped to a bending die by a clamping die, the ... | 11/07/2006 |
| 7104100 | Bending device for tube A tube bending device having draw-bending and compression-bending functions and capable of bending in all processes in a unit of device is provided. The device performing bending by rotating the tube at a predetermined angle with the tube pressured against a circumf... | 09/12/2006 |
| 7082798 | Pipe bending machine A pipe bending machine (1) includes a bending tool (3), a pipe feed unit (9) and a mandrel retractor (19). A pipe holder (8) of the pipe feed unit (9) and a mandrel bar support (24) of the mandrel retractor (19... | 08/01/2006 |
| 7076982 | Concentric bore bend die and clamp insert assembly A concentric bore bend die and clamp insert assembly including a bend die and a clamp insert positioned within a recess formed in the bend die in a tube clamping area of the bend die. The clamp insert includes a curved portion matingly received within a correspondin... | 07/18/2006 |
| 7040133 | Transmission device for a tube bending machine A transmission device for a tube bending machine include a first power means and a second power means mounted on the sliding seat to drive the sliding seat as well as a workpiece securely connected to the sliding seat to move. The second means has a second motor alt... | 05/09/2006 |
| 7032422 | Pipe bending processing apparatus and pipe bending processing method A pipe bending processing apparatus includes a drawing and bending section for pressingly contacting a drawing and bending mold, a clamp mold with one end of a pipe P and performing drawing and bending processing, compression bending section for pressingly contactin... | 04/25/2006 |
| 7017380 | Bending assembly for bending machine A bending assembly on a bending machine for the bending of rod and/or bar-shaped workpieces (8) includes a bending tool (10) and a bending drive unit (11) with a swivel arm (21) and a bending-drive motor (22). The bending tool (... | 03/28/2006 |
| 7010951 | Feeding mechanism of an automatic pipe bending machine A feeding mechanism of a pipe bending machine is equipped with several auxiliary hydraulic cylinders in addition to an original power source for providing power to feed a pipe; the auxiliary hydraulic cylinders are joined to an auxiliary fixing member at output rods... | 03/14/2006 |
| 7007534 | Methods for production of continuous stretches of circular cylindrical members, tools, use of a tool, a length of pipe and pipe parts The present invention regards methods of projecting, producing and bending continuous stretches of circular cylindrical bodies, such as stretches of piping, handrails and rails for stair lifts. The invention also regards a tool for use with the method, application o... | 03/07/2006 |
| 6941787 | Bending device for thin-walled metal pipes A bending device is described for thin-walled metal tubes (R) made of a straight tube guide (1), a core template (2), which adjoins the tube guide (1) and is pivotable in relation thereto, having a connection strip (3), and a mandrel, hav... | 09/13/2005 |
| 6805011 | Sensor for recording extension and stress in solid material A force transducer is inserted into a small boring inside a test object. Inside the boring, it can measure the elastic extensions caused by the surrounding stress matrix. The force transducer is provided in two parts. Both parts are provided with a conical inner bor... | 10/19/2004 |
| 6718811 | Process for producing a guide tube of a nuclear reactor fuel assembly, mandrel for forming the guide tube, and the guide tube obtained A tubular blank (22) is rolled on a mandrel (14) in a pilgrim rolling mill. In a first rolling stage, a first part of the blank (22) is rolled on a first part (18,19) of the mandrel (14), with a reduction of the outside diameter of... | 04/13/2004 |
| 6658912 | Bending block for a bending device The invention relates to a bending mandrel for a bending device and also to a bending method for pipes, more particularly pipes which have a large diameter-to-wall thickness ratio and are to be bent by a small radius, for example, of the order of magnitud... | 12/09/2003 |
| 6588245 | Roll gap control for coiler Roll gap control is provided using a first roll position detector that detects a first position of a first roll, a second roll position detector that detects a first position of a second roll and a third roll position detector that detects a first positio... | 07/08/2003 |
| 6347539 | Bending method for pipe material In a method of bending a pipe material, in order to use an apparatus, such as a press, and prevent the pipe material from being made thin and cracks from being generated, one side of a cylindrical pipe material is firmly held by a first clamp and another ... | 02/19/2002 |
| 6189354 | Method and modular-multistation device for folding profiles The invention relates to a method and multistation device for folding profiles. The folding stations (1, 11, 15, 16, 17) required are modules mounted interchangeable and adjustable on a common machine body (2), which permits quick and simple adaption to t... | 02/20/2001 |
| 6155091 | Mandrel assembly for tube-bending apparatus A mandrel assembly is provided for use with a tube bender including a mandrel rod, a mandrel ball, and a coupler. The coupler is configured to couple the mandrel ball to the mandrel rod and includes a link, a first connector member, a second connector mem... | 12/05/2000 |
| 6009737 | Tube bender A tube-bending machine is provided for forming a tubular work piece having an inner surface. The tube-bending machine comprises a die assembly for forming the tubular work piece to assume a bent shape, actuator systems configured to move the tubular work ... | 01/04/2000 |
| 5979204 | Quick change tooling method and apparatus A quick change tooling method and apparatus has been devised for tube bending operations in which the bend die, clamp die and pressure die as well as mandrel and wiper die, if required, are preassembled along with a tube corresponding to the tube to be be... | 11/09/1999 |
| 5937686 | Bending apparatus for hollow double-structured pipe This invention is concerned with an apparatus for bending a hollow double-structured pipe for use in an exhaust pipe of an internal combustion engine, for example, and aims at providing such hollow double-structured pipe which is capable of effecting favo... | 08/17/1999 |
| 5860307 | Method and apparatus for forming a bent pipe A pipe is bent by advancing the pipe through a guide and into a ring disposed just upstream of said guide in the direction of pipe movement. The ring with the leading end of the pipe therein is moved by a controller along a predetermined curve along which... | 01/19/1999 |
| 5823031 | Method and apparatus for bulge forming and bending tubes There is provided a device and manner for bulge forming and bending a tube or hollow extrusion, such as a pipe or conduit. The one portion of the length of the tube is bulge-formed to define a radially expanded, contoured section of the tube, while anothe... | 10/20/1998 |
| 5775157 | Swinging self-positioning support for pipe bending machines A pipe bending machine with a bending assembly (1) and a support arm (2), pivotedly supported swingingly relative to the bending assembly through a pivot (6) that is slidably supported along a stem (7) on the axis passing through the center of rotation of... | 07/07/1998 |
| 5749255 | Bending device for hollow double-structured pipe Disclosed is an apparatus for bending a hollow double structured pipe, which is simple in construction, and is capable of putting into practice easily the continuous, two- or three-dimensional bending work. This bending apparatus for the hollow double-str... | 05/12/1998 |
| 5632176 | Programmable pressure controlled mandrel extractor for tube bending machine A tube bending machine is provided which includes a rotatable bend die about which the tube is bent, a mandrel insertable into the tube adjacent the bend, and a mandrel rod fixed to a rear end of the mandrel. A mandrel extractor system is also included wh... | 05/27/1997 |
| 5588505 | Cleaning attachment for internal tube mandrel An internal mandrel assembly is provided that includes a cleaning attachment for cleaning the interior surface of a tube during a bending operation. The internal mandrel assembly includes a mandrel shank, a plurality of mandrel ball assemblies pivotally c... | 12/31/1996 |
| 5586462 | Device and method for forming bent pipe of non-annular cross-section A device for converting a straight pipe having an annular cross-section defined between an inner diameter and an outer diameter into a bent pipe having a non-annular cross-section, and method for making the same are disclosed. The device includes a round,... | 12/24/1996 |
| 5483809 | Process for bending a metal tube to a small radius of curvature and a bent metal tube A bent metal tube of high quality having a bend formed with a small radius of curvature, and not having any flattened, cracked, broken, folded, or otherwise defective wall portion, and a bending process which can make the same efficiently. The tube has al... | 01/16/1996 |
| 5406821 | Tube bending apparatus and method A tube loading assembly for use in loading a tube on a flexible mandrel of a tube bending machine; said assembly comprising mandrel receiving means for receiving said mandrel; mandrel alignment means for aligning said received mandrel to be co-axial with ... | 04/18/1995 |
