USRE31938E - Web bending fixture - Google Patents
Web bending fixture Download PDFInfo
- Publication number
- USRE31938E USRE31938E US06/554,537 US55453783A USRE31938E US RE31938 E USRE31938 E US RE31938E US 55453783 A US55453783 A US 55453783A US RE31938 E USRE31938 E US RE31938E
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- US
- United States
- Prior art keywords
- plate
- bending
- anvil
- bed
- fixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
- B21D5/042—With a rotational movement of the bending blade
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F9/00—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically
Definitions
- Web offset printing and production requires precision bending of lithographic plates to assure precise alignment of the images on the plates and longevity of the plates.
- Plate runs can vary between twenty-five thousand to one million impressions without plate malfunction, depending in substantial part on the preparation and bending of the plate.
- Common problems with plates attributable to the web bending fixture utilized include plates with edges that are bent too sharply, not allowing the plate to seat naturally on the cylinder lips, plates with edges which are not bent sharply enough to fit the cylinder lips, plates which do not have parallel leading and trailing edge bends, plates that are out of register because not properly aligned prior to bending or not properly immobilized during bending, and plate lengths between bends which are too long or too short for the cylinder or plates having bent edges which are too long or too short for the cylinder because the plates were improperly positioned on the bender before bending.
- Inventive activity has been directed to the bending of lithographic plates, most of which has incrementally improved various aspects of bending of such plates.
- very precise bends have been achieved with bending fixtures employing the principles of a brake press where the material is clamped before bending and a bar or plate forms a precise bend at the edge of the clamp.
- Brake press bending distorts and stretches the metal and changes the metal structure resulting in varying thicknesses of metal in the bend causing fractures and stress at the bend which shortens plate life.
- Other attempts have been made to resiliently form the metal around the edge of the anvil with the use of compression or tension springs.
- such springs are normally more resilient than the metal being bent and imprecise bending of the edges can occur, particularly in view of the bending pressures applied.
- the present invention incorporates an overall system approach to offset printing and as an element of that system the precision machine tool of the instant invention has been created to precisely position and bend a lithographic plate in precise alignment with previous and subsequent plates.
- the invention incorporates mechanical and operational strengths to accomplish the objectives of the invention at a very high level of performance.
- the advantages of the invention include interrelated and interconnected mass structure that assures a solid, long term relationship of all components.
- the anvils around which bends are formed are structurally and mechanically fixed to assure precise positioning of the bends on the plate. Bends in the plate are created by rolling the metal around anvils utilizing eccentric camming members which are supported throughout their length by a plurality of split bearings which provide a control of the bending operation far more effectively than conventional resilient free-bending devices.
- Air pressure through the table is then reversed to create a vacuum hold-down pressure.
- the register pins are withdrawn from the plate and a clamping bar is applied to each end of the plate to further immobilize it and hold it precisely in position when the bend is created.
- eccentric camming members precisely positioned to accommodate the radius of the anvil around which the bend is to be formed and the exact thickness of the metal or stock to be bent, rolls the metal around the anvil to form the bend. This assures a uniform thickness of metal throughout the bend without stress.
- Each eccentric camming member is fully supported throughout its length by a plurality of split bearings to assure straightness of the bend and parallelism of the bends on the leading edge and trailing edge of the plate and alignment of the image to each bend.
- the camming member is then reversed, a retractable anvil is withdrawn and the upper half of the bearings are raised so that the plate can be removed from the fixture without force or stress of any kind on the formed plate.
- FIG. 1 is a pictorial perspective view of the invention taken from the front right corner and slightly above the fixture with the eccentric camming members in the raised or "ready” position.
- FIG. 2 is a pictorial perspective view of the fixture of FIG. 1 taken from the rear left and slightly above the fixture with the eccentric camming members in the down “clamp” and “bend” position.
- FIG. 3 is a plan view of the invention from above showing the plurality of bearings which support each camming member and the location of limit switches and registration pin mechanisms to position and align the plate before bending.
- FIG. 4 is an enlarged partial pictorial detail view in perspective taken at 4 of FIG. 3 showing one of the registration pin mechanisms with associated limit switch used for alignment of the plate to assure preciseness in positioning of the bends and the image to be reproduced.
- FIG. 5 is an enlarged partial pictorial detail view in perspective taken at 5 of FIG. 3 showing additional structure and operation of the registration pin mechanism of FIG. 4.
- FIG. 6 is a partial elevational view of the registration pin mechanism of FIG. 4 and associated cylinder taken along the line 6--6 of FIG. 3.
- FIG. 7 is a partial sectional elevation of the machine taken along the line 7--7 of FIG. 1 with the eccentric camming members in the raised position.
- FIG. 8 is a partial sectional elevation of the invention taken along the line 7--7 of FIG. 1 with the eccentric camming members in a down clamp and bend position.
- FIG. 9 is the same view as FIGS. 7 and 8 with the eccentric camming members in a rotated bend position.
- FIG. 10 is the same view as FIGS. 7 through 9 with the eccentric camming members in a raised position and with the retraction anvil retracted to allow removal of the bent lithographic plate.
- FIG. 11 is a sectional detail view in elevation taken along the line 11--11 of FIG. 1 to show the structure and operation of the retractable anvil.
- FIG. 12 is a partial elevational view of one of the four actuator sets, this view being the right front actuator set as shown in FIG. 1 with all elements in a raised "ready" position similar to that shown in FIG. 7.
- FIG. 13 is a partial elevational view of the right front actuator set of FIG. 12 in the clamping position corresponding to FIG. 8.
- FIG. 14 is a partial elevational view of the right front actuator set of FIG. 12 in a rotated bend position corresponding to FIG. 9.
- the web bending fixture 20 of the instant invention is designed for use in web offset printing and production and is particularly advantageous as part of a register control system to create repetitive impressions of images properly positioned on the paper being utilized.
- Register control should begin in preparatory procedures and continue to the pins 22 in the web bending fixture 20 of the instant invention.
- the control should begin with the punching of holes in stripping materials and in the edge of the lithographic plates 24 to be utilized.
- Proper registration procedures should be pursued in the stripping operation with plate frame exposure of plates 24 and in the operation known in the art as the "step and repeat" operation. These are the operations that provide the exact placement of images on the lithographic plates 24. They are of little value, however, if the control of register does not continue during the bending of the plates 24 to fit them on the press cylinder.
- FIGS. 1, 2 and 3 give a perspective overview of the invention.
- a support table 26 is provided created of heavy structural steel fixedly secured together such as by welding to provide a solid support for the bending fixture 20.
- a shelf 28 is conveniently provided for, in this embodiment, a vacuum pump and valving for an air logic system.
- Also conveniently connected to the support table is a control panel 30 and, on the other end of the table 26, shown in FIG. 2, a control box 32.
- Control of the registration and bending operation is, in the preferred embodiment shown, automated with an air logic system controlling the sequential functions of the bending operation. It should be obvious that each step in the operation can be achieved manually with the invention as shown in the drawings. Those skilled in the art will realize that control of the bending fixture 20 may also be accomplished with other pneumatic controls, hydraulics or electronically with a printed circuit board or the like.
- the preferred embodiment uses air because of cleanliness of operation, ease and simplicity of maintenance and the ability to achieve rapid and inexpensive repairs if needed.
- Use of air also permits the use of NFPA interchangeable air cylinders for positioning, registration, clamping, bending and kick-out. This allows and permits the use of any other NFPA designated cylinder when a cylinder is in need of replacement which further eases the maintainability of the fixture 20.
- All operating controls for the fixture 20 are preferably located on the control panel 30.
- the register cycle and the forming cycle, to be discussed below, are controlled by individual push buttons 32, 34, and a red "stop" button 36 is also included.
- Key control 39 can be provided to selectively choose automatic operation or, if preferred, manual operation, or the control panel 30 can conveniently provide manual operation only.
- FIGS. 1 through 3 The basic operative elements of the invention 20 which cooperates together to provide a lithographic plate 24 ready for use on the cylinder of a web offset press are generally shown in FIGS. 1 through 3 and shown in detail in the remaining figures.
- the bed 40 of the fixture 20 upon which the plate 24 rests during bending is provided with a hardened anvil 42, 44 on each end, one of which 44 is retractable as shown in FIGS. 7 through 11 for removal of the plate 24 after it is bent.
- An air duct 50 is provided through the bed 40 which initially creates, through apertures 54, an air cushion upon which the plate 24 rides for purposes of positioning and thereafter a vacuum is created to produce a vacuum hold down feature through the apertures 54 in the bed 40.
- Plates to be bent are positioned and aligned in registration with the use of limit switches and registration pins 22. Registration holes 27 in the plate 24 are to assure that the image position is in register with the bends. In some cases the bends are not to be exactly parallel to the edge of the plate 24. Thus, the plate 24 is positioned relative to the registration pins 22 with limit switches and the registration pins 22 automatically position the floating plate 24 on the bed 40 so that the bends, the print line and the image will be in exact register when bent.
- the anvils 42, 44 are the object of all forming pressures, to assure accuracy in making the hundreds of thousands of bends of conventional aluminum plates, and stainless steel when required, the anvils 42, 44 are hardened.
- the anvils 42, 44 utilize a ground radius with tolerance controlled, in the preferred embodiment, to ⁇ 0.003 of an inch. This accuracy meets fully the tolerances required for proper bending of plates 24 in normal situations.
- the eccentric camming members 60, 62 which roll the bends around the anvils 42, 44 are also machined to exact tolerances and hardened.
- Each camming member 60, 62 is rotatably secured at each end within full oilite bearings 61 in steel end plates 70, 72 and 74, 76 and both eccentric camming members 60, 62 are also fully supported throughout by a plurality of split bearings 80.
- six split bearings 82, 84, 86, 88, 90, 92 and 94, 96, 98, 100, 102, 104 are employed intermediate the ends of each camming member 60 and 62 respectively.
- each of the plurality of split bearings 80 consist of a split oilite bearing surface 110, 112 each portion supported in an upper and lower bearing mount 114, 116 respectively.
- the lower bearing mounts 116 are fully integrated into the solid steel table 26, 40 of which the anvils 42, 44 are a part.
- the upper bearing mounts 114 slidably engage the lower bearing mounts 116 so that when bending pressures are applied there is no slippage or movement of the bearing mounts relative to each other.
- Strength of the upper bearing mounts 114 are assured by securing them to solid steel header bars 113, 115 spanning the end plates 70, 74 and 72, 76 and if further strength is necessary the upper surface of the header bars 113, 115 lend themselves to the use of a bolster bar (not shown) which can use gussets (not shown) along its length if additional strength is desired.
- the plate 24 is immobilized by vacuum and by clamping members 120, 122 which engage the plate 24 upon activation of a first set of four cylinders 130, 132, 134, 136 operatively connected to the end plates 70, 72, 74, 76 to slide them in associated slide assemblies 140, 142, 144, 146.
- the eccentric camming members 60, 62 are rotated with the use of four sets 150, 152, 154, 156 of rack 170, 172, 174, 176 and pinion gears 160, 162, 164, 166, one set for each eccentric camming member 60, 62, with one pinion on each end of both eccentric camming members 60, 62.
- Rotation of the pinion gears 160, 162, 164, 166 is accomplished with the use of the corresponding racks 170, 172, 174, 176 which one slidably engaged in slide assemblies 180, 182, 184, 186 associated with each end plate 70, 72, 74, 76 to move downward from the up or “ready” position and each actuated by a corresponding cylinder 190, 192, 194, 196.
- FIGS. 7 through 10 and FIGS. 12 through 14 detail the operational steps and the cooperation of the structural elements of the invention.
- Operation of the web bending fixture 20 is preferably accomplished in three cycles, the register cycle during which the plate 24 is precisely aligned on the fixture 20, the forming cycle during which the plate 24 is precisely bent to fit the press cylinder, and a reversing cycle after which the plate 24 can be easily withdrawn from the bender 20.
- the register cycle is preferably actuated with a first control button 32 which positions the retractable anvil 44 and causes an upward flow of air through the same apertures 54 that are employed during vacuum hold down of the plate 24.
- the retractable anvil 44 is positioned with the use of three cylinders 191 spaced along the anvil 44 each connected to an anvil cam 193 which moves upward to position the anvil 44 in the proper bend position and downward so the anvil 44 retracts.
- the anvil 44 is slidably mounted in the bed 40 and interconnected therewith by a plurality of bolts 195 biased by springs 197 to retract the anvil 44 when the cams 193 are withdrawn.
- anvil 44 Stability of the anvil 44 during bending is assured by a plurality of bolts 203 secured in the bed 40 the heads 205 of which are contained by bolt slots 207 which also limit lateral travel of the anvil 44.
- the inclined surface 209 of the cam 193 assures a precise control of anvil 44 travel, when properly adjusted, for placement of the bends and distance between the bends.
- the upward flow of air through the bed 40 permits floating the plate 24 onto and into the bending fixture 20 and is particularly advantageous when placing large plates 24 on the fixture 20 and has further value in the ease with which the plate 24 responds to alignment and registration prior to bending.
- Positioning of the plate 24 prior to registration without visual effort results from the use of three limit switches 202, 204, 206 shown in FIG. 3.
- Two of the limit switches 202, 204 are cooperatively attached to the registration pin mechanisms 208, 210 as shown in FIGS. 3 and 4 and the third limit switch 206 is preferably positioned to engage a lateral side of the plate 24 as shown in FIG. 3.
- the three point triangulation assures a precise alignment of the plate 24 for insertion of the registration pins 22.
- full contact must be established with all three limit switches 202, 204, 206 prior to registration.
- a two second dwell time is preferably required before the registration pins 22 move upward.
- the air logic system of the invention moves the registration pins 22 upward with air cylinders 25.
- the structural and operational detail of one 210 of the registration pin assemblies 208, 210, 212 is shown in FIGS. 4 through 6.
- the assembly 210 consists of the registration pin cylinder 25, which moves the pin 22 through the prepunched hole 27 in the plate 24. Straddling the pin 22 and 27 are slidably mounted containment fingers 21, 23 to prevent the plate from rising and to assure penetration of the pins 22 into the holes 27.
- the registration pins 22 which exactly align the plate 24 prior to bending so that the image is in perfect registration when used on the cylinder of the press. As shown best in FIG.
- the increasing diameter of the rounded tip of the pins 22 incrementally moves the plate 24 into such exact alignment for perfect registration.
- the upward flow of air during this operation assures fast and easy movement of the plate 24 in gaining register control with the pins 22 due to the lack of surface tension between plate 24 and bed 40.
- portions of the registration pin assemblies 208, 210 and 212 are moved out of the area of the bends.
- two registration pin assemblies 208, 210 can be utilized, as shown in FIG. 2, to achieve lateral and longitudinal alignment since the outer diameter of the registration pins 22 correspond exactly to the inner diameter of the registration holes 27. Even more precise tolerance and alignment can be achieved with a third registration pin mechanism 212 as shown in FIGS. 1 and 3 where triangulation of the positioning assures absolute alignment of the plate 24 prior to bending.
- a forming cycle is then initiated.
- the flow of air through the apertures 54 of the bed 40 is reversed to create a vacuum pressure to hold the plate 24 flat and firmly to the bed 40 of the bender 20.
- a sensor (not shown) be used to regulate the vacuum whereby no forming action can continue until the desired vacuum is drawn.
- Each of the four clamping cylinders 130, 132, 134, 136 are then activated to bring down the spring loaded clamping bars 120, 122, on each end of the fixture 20. In this manner, the plate 24 is completely immobilized and solidly held during the bending operation. Since the bending cylinders 190, 192, 194, 196 are mounted on the end plates 70, 72, 74, 76 slidably mounted in the slide assemblies 140, 142, 144, 146 retraction of the shafts of the slide cylinders 130, 132, 134, 136 brings the eccentric bending members 60, 62 into position to bend as shown in FIGS. 8 and 13.
- FIGS. 4 and 5 it can be seen how downward movement of the end plates 70, 72, 74 and 76 and associated header bars 113, 115 removes the registration pin mechanism containment fingers 21, 23 from the area of the bend.
- a ramp mechanism 211 Integrally formed with the fingers 21, 23 is a ramp mechanism 211 channeled and positioned to receive a positioning member 213 solidly attached to the header bar 113.
- the positioning member 213, as shown, is a solid steel triangular finger 215 insertable in the channeled ramp 211.
- the fingers 21, 23 and ramp 211 are slidably mounted in a registration pin assembly block 219 which is fixed to the bed 40.
- downward movement of the header bar 113 and 115 causes the fingers 21, 23 to retract so that the metal 24 can be formed.
- each registration pin mechanism 208, 210, 212 is biased by a spring 233 to return the fingers 21, 22 and associated ramp 211 to a receiving position when the header bar 113, 115 is raised to form a new plate 24.
- each camming member 60, 62 held solidly against the upper split bearings 114 constant alignment of each camming member 60 and 62 is assured by its pressure against the upper bearing surfaces 110 of the plurality of split bearings 80 with which it is associated.
- the steel support beams, the header bars 113, 115 serve to hold the upper slit bearings 114 in exact and constant alignment.
- the camming member rotation cylinders, or bending cylinders 190, 192, 194, 196, two sets at the ends of both leading and trailing edges of the plate 24, are actuated to form the bends.
- the shafts of the bending cylinders 190, 192, 194, 196 are connected to racks 170, 172, 174, 176, slidably mounted in slide assemblies 180, 182, 184, 186 secured to the end plates 70, 72, 74, 76 to rotate pinion gears 160, 162, 164, 166, one at each end of both eccentric camming members 60, 62.
- each cam 60, 62 is, when forming begins, in contact with the upper surface of the plate 24 which establishes the radius of rotation of each eccentric camming member 60, 62 as the radius of the anvil 42, 44 plus the thickness of the stock 24 being bent.
- the split bearings surfaces 110, 112 are in full contact with each other and the bearing mounts 114, 116 are locked together by the support heel 225 on the lower split bearing mount 116 as shown in FIGS. 8 and 13.
- the result is perfect alignment of the split bearings 123, 125.
- each camming member 60, 62 is rotated around its respective anvil 42, 44 the metal thickness across the entire bend remains uniform because the fully supported camming members 60, 62 can provide only a perfectly straightline pressure and because the camming action is controlled precisely on the radius of the anvil 42, 44 but separated from the anvil 42, 44 by the thickness of the plate 24 being formed.
- This result is achieved by the alignment of the split bearings 123, 125 to provide a constant pressure at various points along the camming member 60, 62 and the plurality of split bearings 80 further establish a constant relationship of each bending member 60, 62 to its respective anvil 42, 44.
- the use of the split bearings 80 provides the constant bearing surface 110, 112 which controls the alignment of the bending member 60, 62 relative to the plate 24 and the anvil 42, 44.
- the radius of revolution of the camming members 60, 62 matches the inner radius of the split bearings 80.
- a constant pressure is maintained by the camming member 60, 62 against the inner surfaces 110, 112 to assure straightness in bending and the upper and lower split bearing surfaces 110, 112 are in continuous contact during the bending operation to provide an extremely strong resistance to any deviation of the bending member 60, 62 during bending.
- precise control is achieved by precisely positioning the bending surface 220 of camming members 60, 62 away from the anvil 42, 44 to compensate for metal thickness. Maintaining this distance of the flat portion 220 of the eccentric camming member 60, 62 to the upper surface of the plate 24 assures a radius of rotation of the bending surface closest to the anvil and around the anvil to be equivalent to the radius of the anvil 42, 44 plus the thickness of the stock 24.
- the clearance of the camming member 60, 62 to the anvil 42, 44 is controllable to ⁇ 0.001 of an inch.
- the web bending fixture 20 of the instant invention may be easily modified by simply replacing the eccentric bending member 60 and 62 with equivalent members 60', 62' having bending surfaces 220, 230 machined to offset the necessary thickness.
- the metal of the plate 24 is rolled or formed around the anvil 42, 44 radius without distortion, stretching or otherwise stressing the metal 24 in the bend and the plate 24 when used on a cylinder will have a uniform thickness throughout the plate 24, including a uniform metal thickness throughout the bends.
- a reversing cycle is employed to cause reversal of the bending operation.
- the eccentric camming members 60, 62 are rotated upward and the upper split bearings 114 are raised.
- the anvil 44 is retracted with the use of three retractable cams 193 activated by the cam cylinders 191 so that the plate 24 need not be forced off the anvil 42, 44.
- the retraction anvil 44 is spring biased with springs 197 to retract the anvil 44 when the anvil cams 193 are withdrawn.
- An automatic eject mechanism 240 is also conveniently provided as shown in FIGS.
- operation of the fixture 20 is as follows: an air cushion is established through apertures 54 in the bed 40, and the retractable anvil 44 is positioned at the proper position for the bend which has been previously established according to the thickness of the plate 24 to be bent and the desired distance between bends.
- the plate 24 is placed on the bed 40 and moved to three limit switches 202, 204, 206. Contact by the plate 24 with all three limit switches 202, 204, 206 causes registration pins 22 associated with two 208, 210 or three 208, 210, 212 registration pin mechanisms to exactly align the plate 24.
- Forming of the plate 24 then takes place providing the plate 24 has been properly positioned with the register pins 22.
- the air cushion is withdrawn and a vacuum is established.
- the registration pins 22 are withdrawn and the four slide cylinders 130, 132, 134, 136 go down to further immobilize and clamp 120, 122 the plate 24 in position for the bend.
- the four cylinders 190, 192, 194, 196 for the cams 60, 62 go up to reverse the camming elements 60, 62 and return the camming elements 60, 62 to the upper split bearings 114.
- the four cylinders 130, 132, 134, 136 for the end plates 70, 72, 74, 76 go up to raise the clamping bars 120, 122, and the upper split bearings.
- the anvil cylinders 191 are then withdrawn to retract the retractable anvil 44.
Abstract
Description
Claims (29)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US06554537 USRE31938F1 (en) | 1981-01-30 | 1983-11-23 | Web bending fixture |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US06/230,281 US4365500A (en) | 1981-01-30 | 1981-01-30 | Web bending fixture |
US06554537 USRE31938F1 (en) | 1981-01-30 | 1983-11-23 | Web bending fixture |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US06/230,281 Reissue US4365500A (en) | 1981-01-30 | 1981-01-30 | Web bending fixture |
Publications (2)
Publication Number | Publication Date |
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USRE31938E true USRE31938E (en) | 1985-07-09 |
USRE31938F1 USRE31938F1 (en) | 1998-09-08 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US06554537 Expired - Lifetime USRE31938F1 (en) | 1981-01-30 | 1983-11-23 | Web bending fixture |
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US (1) | USRE31938F1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5007264A (en) * | 1987-11-19 | 1991-04-16 | Feintool International Holding | Method and apparatus for the bending of workpieces |
US20030159491A1 (en) * | 2002-02-27 | 2003-08-28 | Stalzer Leo H. | Sheet metal bending machine for forming cleats |
US20050050934A1 (en) * | 2002-04-15 | 2005-03-10 | Gabriel Le Guevel | Crimping blade profile |
US20070033979A1 (en) * | 2005-08-15 | 2007-02-15 | Deis Robert M | Methods and apparatuses for making lithographic plates |
US20070277577A1 (en) * | 2004-10-29 | 2007-12-06 | Allen Clyde G | Sheet metal brake and hinge mechanism therefor |
US20080127848A1 (en) * | 2006-03-28 | 2008-06-05 | Deis Robert M | Methods and apparatuses for making lithographic plates |
US20080216549A1 (en) * | 2003-11-14 | 2008-09-11 | Tapco International Corporation | Sheet metal bending brake |
US20090126446A1 (en) * | 2007-11-05 | 2009-05-21 | Deis Robert M | Bending apparatus having changeable anvils and related methods |
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US2433319A (en) * | 1943-01-18 | 1947-12-23 | Thomas J Hey | Journal lubricating device |
US2474683A (en) * | 1946-04-22 | 1949-06-28 | Albert T O Neil | Bending brake with adjustable work stop and clamping means |
US2521840A (en) * | 1949-03-04 | 1950-09-12 | Fennell Frank | Machine for bending sheet metal |
US2663349A (en) * | 1949-07-01 | 1953-12-22 | Hoe & Co R | Means for constructing printing plates |
US3020590A (en) * | 1959-02-09 | 1962-02-13 | Siegert Walter | Bending tool for plastic tile |
US3187542A (en) * | 1959-11-12 | 1965-06-08 | American Type Founders Co Inc | Bending apparatus for printing plates |
US3301034A (en) * | 1964-02-11 | 1967-01-31 | Bastian Blessing Co | Sheet metal die forming apparatus |
US3350912A (en) * | 1965-05-21 | 1967-11-07 | Jr Raymond E Smith | Bending machine |
US3359771A (en) * | 1965-07-01 | 1967-12-26 | Dreis & Krump Mfg Co | Bench brake |
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US3733872A (en) * | 1971-07-15 | 1973-05-22 | C Gregoire | Roller bender for offset printing plates |
US3914974A (en) * | 1974-04-19 | 1975-10-28 | William Devore | Lithographic plate bending arrangement |
US3948074A (en) * | 1974-12-09 | 1976-04-06 | Lion Services, Inc. | Combination cleat bender and bar folder apparatus |
US4181002A (en) * | 1976-09-22 | 1980-01-01 | Walter Eckold Vorrichtungs u. Geratebau Sperrluttertal | Tools for bending sheet metal |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
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US5007264A (en) * | 1987-11-19 | 1991-04-16 | Feintool International Holding | Method and apparatus for the bending of workpieces |
US20030159491A1 (en) * | 2002-02-27 | 2003-08-28 | Stalzer Leo H. | Sheet metal bending machine for forming cleats |
US6810708B2 (en) * | 2002-02-27 | 2004-11-02 | Lion Machinery, Inc. | Sheet metal bending machine for forming cleats |
US20050050934A1 (en) * | 2002-04-15 | 2005-03-10 | Gabriel Le Guevel | Crimping blade profile |
US7124612B2 (en) * | 2002-04-15 | 2006-10-24 | Process Conception Ingenierie | Crimping blade profile |
US20080216549A1 (en) * | 2003-11-14 | 2008-09-11 | Tapco International Corporation | Sheet metal bending brake |
US7549311B2 (en) | 2003-11-14 | 2009-06-23 | Tapco International Corporation | Sheet metal bending brake |
US7669451B2 (en) | 2003-11-14 | 2010-03-02 | Tapco International Corporation | Sheet metal bending brake |
US20090255315A1 (en) * | 2003-11-14 | 2009-10-15 | Tapco International Corporation | Sheet metal bending brake with improved hinge |
US20080223103A1 (en) * | 2004-10-29 | 2008-09-18 | Tapco International Corporation | Sheet metal bending brake |
US20070277577A1 (en) * | 2004-10-29 | 2007-12-06 | Allen Clyde G | Sheet metal brake and hinge mechanism therefor |
US7685858B2 (en) | 2004-10-29 | 2010-03-30 | Tapco International Corporation | Sheet metal bending brake |
US20100147046A1 (en) * | 2004-10-29 | 2010-06-17 | Tapco International Corporation | Sheet metal bending brake |
US7954352B2 (en) | 2004-10-29 | 2011-06-07 | Tapco International Corporation | Sheet metal bending brake |
US20110232353A1 (en) * | 2004-10-29 | 2011-09-29 | Tapco International Corporation | Sheet metal bending brake |
US20070033979A1 (en) * | 2005-08-15 | 2007-02-15 | Deis Robert M | Methods and apparatuses for making lithographic plates |
US20080127848A1 (en) * | 2006-03-28 | 2008-06-05 | Deis Robert M | Methods and apparatuses for making lithographic plates |
US20090126446A1 (en) * | 2007-11-05 | 2009-05-21 | Deis Robert M | Bending apparatus having changeable anvils and related methods |
US8087278B2 (en) | 2007-11-05 | 2012-01-03 | Nela Ternes Register Group, Inc. | Bending apparatus having changeable anvils and related methods |
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