US3559444A - Brake for bending sheet material - Google Patents
Brake for bending sheet material Download PDFInfo
- Publication number
- US3559444A US3559444A US710326A US3559444DA US3559444A US 3559444 A US3559444 A US 3559444A US 710326 A US710326 A US 710326A US 3559444D A US3559444D A US 3559444DA US 3559444 A US3559444 A US 3559444A
- Authority
- US
- United States
- Prior art keywords
- pressure
- anvil
- bending
- sheet material
- shaped members
- 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
Definitions
- the brake for bending sheet material disclosed herein comprises a pair of spaced base rails on which C-shaped members are positioned at longitudinally spaced points.
- a first member is fixed on the lower arms of the C-shaped members and has a clamping surface.
- a second member having a bending surface is hinged -to the first member.
- An anvil member is provided over the clamping surface and a pressure member is interposed between the anvil member and the upper arms of the C-shaped members.
- the pressure member has wedges thereon which function when the pressure member is translated longitudinally to apply pressure to the anvil member.
- a handle is pivoted to the first member at one end and is operatively connected to the pressure member for shifting the pressure member.
- Complementary longitudinally extending ribs and valleys are provided between the surfaces of the pressure member and anvil member.
- An electrical strip heater is hinged to the C-sha-ped members and is movable into a position adjacent the hinge line for heating the bending point of material .where the material to be bent is made of plastic such as vinyl sheet.
- This invention relates to brakes for bending sheet material such as aluminum sheet and vinyl sheet that is utilized for application as siding for buildings and the like.
- FIG. 1 is a fragmentary perspective view of a portion of a sheet bending brake embodying the invention.
- FIG. 2 is a fragmentary sectional view taken along the line 2-2 in FIG. 1.
- FIG. 3 is a fragmentary part sectional view of a modified form of sheet bending brake.
- FIG. 4 is a transverse sectional view of the sheet bending brake shown in FIG. 3.
- the sheet bending brake embodying the invention comprises a pair of spaced inverted channel members 10, 11 formed of aluminum extrusions and longitudinally spaced C-shaped members 12 comprising aluminum castings bolted to the rails 10, 11.
- Each C-shaped member 12 includes a lower arm 13, an upper arm 14 and an intermediate portion 15. The lower arms 13 are bolted to the rails 10, 11.
- a first member 16 in the form of an inverted channel is fixed on the lower leg 13 and a second channel 17 is hinged along one edge to the channel 16.
- Members 16, 17 are formed with mating integral projections 18, 19 along their adjacent longitudinal edges that are made 3,559,444 Patented Feb. 2, 1971 by machining the edges along flat transverse planes.
- the projections are provided with aligned openings 20 and a hinge pin 21 is inserted in the openings to complete the hinge.
- the upper surface 22 of member 16 provides a clamping surface and a generally L-shaped anvil member 23 is provided in overlying relation to the clamping surface 22 of the member 16.
- the anvil member 23 includes a sharp longitudinally extending edge 24 adjacent the hinge line.
- a pressure or backing plate 25 is provided in overlying relationship to the anvil member 23 and has inclined cams or wedges 26 fixed at longitudinally spaced points thereon in overlying relationship to the arms 14 of C- s'haped members 12.
- the pressure member 25 is adapted to be moved longitudinally by an arrangement which includes a bracket 27 fixed on the member 16 at one end.
- An operating handle or lever 28 is pivoted at its lower end to the bracket 27 and intermediate its ends to a bracket 29 extending from a block 30 on the pressure member 25. By shifting the lever inwardly or toward the left as viewed in FIG. 1, the pressure member 25 is moved to wedge the pressure member downwardly onto the anvil member 23 to clamp a piece of sheet material S between the anvil member 23 and the first member 16.
- Spring plates 31 are fixed to each upper arm 14 and extend between brackets 32 fixed 0n the anvil member 23 to tend to elevate the anvil member 23 when the cams 26 are moved to the right as viewed in FIG. 1.
- the ends of the anvil member 23 and pressure member 25 extend beyond the end of the first member 16 sufliciently so that when the pressure member 25 is moved to the right to relieve the pressure on the anvil member no portion of the end of the pressure member extends beyond the end of the anvil member. This insures that the pressure member will not become bent or damaged and will at all times remain straight insuring a uniform pressure on the sheet material.
- the lever 28 When a piece of sheet material such as aluminum sheet metal is to be bent, the lever 28 is swung to the right as viewed in FIG. 1 to relieve the clamping pressure and to elevate the anvil member 23. The sheet material is then inserted in proper position between the member 16 and anvil member 23 and the lever 28 is moved to the left as viewed in FIG. 1 to clamp the sheet metal. The member 17 is then swung upwardly through a handle, not shown, to bend the sheet material to the desired angle.
- FIGS. 3 and 4 provision is made for heating the line of bending so that plastic sheet material can be bent.
- An electrical strip heater 40 is fixed to an aluminum angle 41 that is supported on U-shaped hinge members 42 that are pivoted to the upper arm 43 of the C-shaped members. Insulating material 44 is interposed between the angle 41 and the hinges 42.
- the heater and angle extend longitudinally throughout the length of the hinge and when in the position shown in FIG. 4, the heater engages the strip material along the bend line applying heat thereto. After a predetermined interval, depending on the nature of the plastic material to be bent, the heater is swung upwardly 3 to the broken line position permitting the member 17 to 'be swung upwardly to bend the material that has been heated along the hinge line.
- a brake for bending sheet material comprising a first member having a clamping surface
- an anvil member extending longitudinally of said first member
- a pressure member extending longitudinally of said anvil member for applying pressure to said anvil member to clamp a workpiece on the clamping surface of said first member
- a brake for bending sheet metal comprising a pair of spaced base rails,
- each said C-shaped member comprising a lower arm fixed to said rails and an upper arm spaced from and overlying said lower arm,
- first and second members having longitudinally spaced integral intermeshing projections extending outwardly along substantially the entire length of the longitudinal edges thereof
- each said projection of each said member being positioned such that all portions thereof do not extend above the plane of the surface of its corresponding member when the surfaces are substantially aligned
- a hinge pin extending through said openings to define a hinge
- said anvil member having a longitudinal edge extending along said hinge line
- said means for clamping said anvil member against said first member including cam means between said upper arms of said C-shaped members and said anvil member,
- said heater means being operable to heat said piece of sheet material when said first member is in position for clamping said piece of sheet material.
- a brake for bending sheet material comprising a first member having a clamping surface
- an anvil member extending longitudinally of said first member
- a pressure member extending longitudinally of said anvil member for applying pressure to said anvil member to clamp a workpiece on the clamping surface of said first member
- a brake for bending sheet material comprising a pair of spaced base rails,
- each said C-shaped member comprising a lower arm fixed to said rails and an upper arm spaced from and overlying said lower arm,
- each said projection of each said member being positioned such that all portions thereof do not extend above the plane of the surface of its corresponding member when the surfaces are substantially aligned
- a hinge pin extending through said openings to define a hinge
- said anvil member having a longitudinal edge extending along said hinge line
- said means for clamping said anvil member against said first member including cam means between said upper arms of said C-shaped members and said anvil member,
- said heater means comprises a; electric strip1 heater and hinges 10 RICHARD T. HERBST, Primary Examiner ivotall mounting said eater on sai upper arms. p 14.; T he combination set forth in claim 1 wherein said KEENAN Asslstant Exammer cooperating surfaces of said anvil member and said pres- U S C1 sure member comprise integral portions of said pressure 296 member and anvil member which extend longitudinally 15 and guide said pressure member longitudinally while preventing lateral movement thereof.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
THE BRAKE FOR BENDING SHEET MATERIAL DISCLOSED HEREIN COMPRISES A PAIR OF SPACED BASE RAILS ON WHICH C-SHAPED MEMBERS ARE POSITIONED AT LONGITUDINALLY SPACED POINTS. A FIRST MEMBER IS FIXED ON THE LOWER ARMS OF THE C-SHAPED MEMBERS AND HAS A CLAMPING SURFACE. A SECOND MEMBER HAVING A BENDING SURFACE IS HINGED TO THE FIRST MEMBER. AN ANVIL MEMBER IS PROVIDED OVER THE CLAMPING SURFACE AND A PRESSURE MEMBER IS INTERPOSED BETWEEN THE ANVIL MEMBER AND THE UPPER ARMS OF THE C-SHAPED MEMBERS. THE PRESSURE MEMBER HAS WEDGES THEREON WHICH FUNCTION WHEN THE PRESSURE MEMBER IS TRANSLATED LONGITUDINALLY TO APPLY PRESSURE TO THE ANVIL MEMBER. A HANDLE IS PIVOTED TO THE FIRST MEMBER AT ONE END AND IS OPERATIVELY CONNECTED TO THE PRESSURE MEMBER FOR SHIFTING THE PRESSURE MEMBER. COMPLEMENTARY LONGITUDINALLY EXTENDING RIBS AND VALLEYS ARE PROVIDED BETWEEN THE SURFACES OF THE PRESSURE MEMBER AND ANVIL MEMBER. AN ELECTRICAL STRIP HEATER IS HINGED TO THE C-SHAPED MEMBERS AND IS MOVABLE INTO A POSITION ADJACENT THE HINGE LINE FOR HEATING THE BENDING POINT OF MATERIAL WHERE THE MATERIAL TO BE BENT IS MADE OF PLASTIC SUCH AS VINYL SHEET.
Description
L. :-:.a-:iL zEY ET v 3, BRAKE smmiue SHEET MATERIAL I Feb. 2, 1971 Y 2 Sheets-Sheet 1 Filed March 4.2 1368 v INVENTORS v Zflh'ebvceE 5442:) v 1m; nee 6. Amesw ATTORNEYS L. E. BLAZEY ETA!- BRAKE FOR BENDING SHEET MATERIAL Feb. 2, 1971 2 Sheets-Sheet 2 Filed March 4, 1968 INVENTORS ZAMQEA/CEEBAAZfY BY 17/9472 G/MAZJH ATTORNEYS United States Patent 3,559,444 BRAKE FOR BENDING SHEET MATERIAL Lawrence E. Blazey and Walter G. Marsh, Detroit, Mich., assignors to Tapco Products Company, Inc., Detroit,
Mich., a corporation of Michigan Filed Mar. 4, 1968, Ser. No. 710,326
Int. Cl. B21d 11/04 US. Cl. 72-319 14 Claims ABSTRACT OF THE DISCLOSURE The brake for bending sheet material disclosed herein comprises a pair of spaced base rails on which C-shaped members are positioned at longitudinally spaced points. A first member is fixed on the lower arms of the C-shaped members and has a clamping surface. A second member having a bending surface is hinged -to the first member. An anvil member is provided over the clamping surface and a pressure member is interposed between the anvil member and the upper arms of the C-shaped members. The pressure member has wedges thereon which function when the pressure member is translated longitudinally to apply pressure to the anvil member. A handle is pivoted to the first member at one end and is operatively connected to the pressure member for shifting the pressure member. Complementary longitudinally extending ribs and valleys are provided between the surfaces of the pressure member and anvil member. An electrical strip heater is hinged to the C-sha-ped members and is movable into a position adjacent the hinge line for heating the bending point of material .where the material to be bent is made of plastic such as vinyl sheet.
This invention relates to brakes for bending sheet material such as aluminum sheet and vinyl sheet that is utilized for application as siding for buildings and the like.
Among the objects of the invention are to provide an improved brake of the type disclosed and claimed in the patent to Marsh No. 3,161,223, issued Dec. 15, 1964, which is more efficient, subject to tougher usage and which can be utilized for bending plastic sheet material such as vinyl siding.
In the drawings:
FIG. 1 is a fragmentary perspective view of a portion of a sheet bending brake embodying the invention.
FIG. 2 is a fragmentary sectional view taken along the line 2-2 in FIG. 1.
FIG. 3 is a fragmentary part sectional view of a modified form of sheet bending brake.
FIG. 4 is a transverse sectional view of the sheet bending brake shown in FIG. 3.
Referring to FIGS. 1 and 2, the sheet bending brake embodying the invention comprises a pair of spaced inverted channel members 10, 11 formed of aluminum extrusions and longitudinally spaced C-shaped members 12 comprising aluminum castings bolted to the rails 10, 11. Each C-shaped member 12 includes a lower arm 13, an upper arm 14 and an intermediate portion 15. The lower arms 13 are bolted to the rails 10, 11.
A first member 16 in the form of an inverted channel is fixed on the lower leg 13 and a second channel 17 is hinged along one edge to the channel 16. Members 16, 17 are formed with mating integral projections 18, 19 along their adjacent longitudinal edges that are made 3,559,444 Patented Feb. 2, 1971 by machining the edges along flat transverse planes. The projections are provided with aligned openings 20 and a hinge pin 21 is inserted in the openings to complete the hinge.
The upper surface 22 of member 16 provides a clamping surface and a generally L-shaped anvil member 23 is provided in overlying relation to the clamping surface 22 of the member 16. The anvil member 23 includes a sharp longitudinally extending edge 24 adjacent the hinge line.
A pressure or backing plate 25 is provided in overlying relationship to the anvil member 23 and has inclined cams or wedges 26 fixed at longitudinally spaced points thereon in overlying relationship to the arms 14 of C- s'haped members 12. The pressure member 25 is adapted to be moved longitudinally by an arrangement which includes a bracket 27 fixed on the member 16 at one end. An operating handle or lever 28 is pivoted at its lower end to the bracket 27 and intermediate its ends to a bracket 29 extending from a block 30 on the pressure member 25. By shifting the lever inwardly or toward the left as viewed in FIG. 1, the pressure member 25 is moved to wedge the pressure member downwardly onto the anvil member 23 to clamp a piece of sheet material S between the anvil member 23 and the first member 16.
The anvil member 23 and pressure member 25 have cooperating generally V-shaped ribs 33, 34 and valleys 35, 36 which extend longitudinally between the edges thereof for guiding the movement of the pressure member relative to the anvil member.
As shown in FIG. 1, the ends of the anvil member 23 and pressure member 25 extend beyond the end of the first member 16 sufliciently so that when the pressure member 25 is moved to the right to relieve the pressure on the anvil member no portion of the end of the pressure member extends beyond the end of the anvil member. This insures that the pressure member will not become bent or damaged and will at all times remain straight insuring a uniform pressure on the sheet material.
When a piece of sheet material such as aluminum sheet metal is to be bent, the lever 28 is swung to the right as viewed in FIG. 1 to relieve the clamping pressure and to elevate the anvil member 23. The sheet material is then inserted in proper position between the member 16 and anvil member 23 and the lever 28 is moved to the left as viewed in FIG. 1 to clamp the sheet metal. The member 17 is then swung upwardly through a handle, not shown, to bend the sheet material to the desired angle.
In the form of the invention shown in FIGS. 3 and 4, provision is made for heating the line of bending so that plastic sheet material can be bent. An electrical strip heater 40 is fixed to an aluminum angle 41 that is supported on U-shaped hinge members 42 that are pivoted to the upper arm 43 of the C-shaped members. Insulating material 44 is interposed between the angle 41 and the hinges 42. The heater and angle extend longitudinally throughout the length of the hinge and when in the position shown in FIG. 4, the heater engages the strip material along the bend line applying heat thereto. After a predetermined interval, depending on the nature of the plastic material to be bent, the heater is swung upwardly 3 to the broken line position permitting the member 17 to 'be swung upwardly to bend the material that has been heated along the hinge line.
We claim:
1. In a brake for bending sheet material, the combination comprising a first member having a clamping surface,
a second member having a bending surface,
means for hinging said second member to' said first member,
an anvil member extending longitudinally of said first member,
a pressure member extending longitudinally of said anvil member for applying pressure to said anvil member to clamp a workpiece on the clamping surface of said first member,
said last-mentioned member having wedge means thereon,
means mounted on said first member for shifting said pressure member longitudinally to engage said wedge means,
the longitudinal ends of said anvil member and said pressure member extending beyond the end of said first member to which said shifting means is attached such that no portion of the pressure member extends beyond the anvil member.
2. The combination set forth in claim 1 wherein the cooperating surfaces of said anvil member and said pressure member are formed with a plurality of complementary longitudinal ribs and valleys spaced from the edges of said members.
3. The combination set forth in claim 2 wherein said ribs and valleys are generally V-shaped.
4. The combination set forth in claim 1 wherein said anvil member has a longitudinal edge extending along the hinge line and means for applying heat to the sheet material along the hinge line while said first member is in position for clamping a piece of sheet material.
5. The combination set forth in claim 4 wherein said last-mentioned means is movable into and out of position along said hinge line.
6. In a brake for bending sheet metal, the combination comprising a pair of spaced base rails,
a plurality of C-shaped members positioned on said base rails at longitudinally spaced points,
each said C-shaped member comprising a lower arm fixed to said rails and an upper arm spaced from and overlying said lower arm,
a first member fixed on the lower arms of said C-shaped members and having a clamping surface,
an anvil member,
means for locking said anvil member on said first member to clamp a piece of sheet metal between said anvil member and said clamping surface of said first member,
a second member having a bending surface,
said first and second members having longitudinally spaced integral intermeshing projections extending outwardly along substantially the entire length of the longitudinal edges thereof,
each said projection of each said member being positioned such that all portions thereof do not extend above the plane of the surface of its corresponding member when the surfaces are substantially aligned,
said projections having aligned openings,
a hinge pin extending through said openings to define a hinge,
said anvil member having a longitudinal edge extending along said hinge line,
said means for clamping said anvil member against said first member including cam means between said upper arms of said C-shaped members and said anvil member,
means for shifting said pressure member longitudinally to engage said cam means,
the longitudinal ends of said anvil member and said pressure member extending beyond the end of said first member to which said shifting means is attached.
7. The combination set forth in claim 6 wherein the cooperating surfaces of said anvil member and said pressure member are formed with a plurality of complementary longitudinal ribs and valleys spaced from the edges of said members.
8. The combination set forth in claim 7 wherein said 10 ribs and valleys are generally V-shaped.
9. The combination set forth in claim 6 wherein said anvil member has a longitudinal edge extending along the hinge line and means for applying heat to the sheet material along the hinge line,
said heater means being operable to heat said piece of sheet material when said first member is in position for clamping said piece of sheet material.
10. The combination set forth in claim 9 wherein means for pivoting said last-mentioned means on said upper arms for movement into and out of position along said hinge line.
11. In a brake for bending sheet material, the combination comprising a first member having a clamping surface,
a second member having a bending surface,
means for hinging said second member to said first member,
an anvil member extending longitudinally of said first member,
a pressure member extending longitudinally of said anvil member for applying pressure to said anvil member to clamp a workpiece on the clamping surface of said first member,
means for locking said anvil member on said first member to clamp a piece of sheet material between said anvil member and said clamping surface of said first member,
means for applying heat to said sheet material along the bending line while said piece of sheet material is clamped by said first member,
and means for mounting said last-mentioned means for movement between a position adjacent said bending line and a position out of the path of said second member to permit bending of said sheet material.
12. In a brake for bending sheet material, the combination comprising a pair of spaced base rails,
a plurality of C-shaped members positioned on said base rails at longitudinally spaced points,
each said C-shaped member comprising a lower arm fixed to said rails and an upper arm spaced from and overlying said lower arm,
a first member fixed on the lower arms of said C-shaped members and having a clamping surface,
an anvil member,
means for locking said anvil member on said first member to clamp a piece of sheet material between said anvil member and said clamping surface of said first member,
a second member having a bending surface,
each said projection of each said member being positioned such that all portions thereof do not extend above the plane of the surface of its corresponding member when the surfaces are substantially aligned,
said projections having aligned openings,
a hinge pin extending through said openings to define a hinge,
said anvil member having a longitudinal edge extending along said hinge line,
said means for clamping said anvil member against said first member including cam means between said upper arms of said C-shaped members and said anvil member,
means for shifting said pressure member longitudinally to engage said cam means,
and heater means hinged to said upper arms of said References Cited C-shaped members for movement between a position adjacent said hinge line for heating a piece of sheet UNITED STATES PATENTS material to a position out of the path of Said second 2,937,689 5/ 1960 Peterson 72305 member to permit bending of the sheet material 3,009,201 11/ 1961 Hansen 1819BM saidheater means being operable to heat said piece of 5 3,147,791 9/ 1964 Rauen et a1 72319 sheet material while said piece of sheet material is 3,149,376 9/1964 Lee 1819BM clamped by said first member. 3,161,223 12/ 1964 Marsh 72319 13. The combination set forth in claim 12 wherein said heater means comprises a; electric strip1 heater and hinges 10 RICHARD T. HERBST, Primary Examiner ivotall mounting said eater on sai upper arms. p 14.; T he combination set forth in claim 1 wherein said KEENAN Asslstant Exammer cooperating surfaces of said anvil member and said pres- U S C1 sure member comprise integral portions of said pressure 296 member and anvil member which extend longitudinally 15 and guide said pressure member longitudinally while preventing lateral movement thereof.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US71032668A | 1968-03-04 | 1968-03-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3559444A true US3559444A (en) | 1971-02-02 |
Family
ID=24853564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US710326A Expired - Lifetime US3559444A (en) | 1968-03-04 | 1968-03-04 | Brake for bending sheet material |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3559444A (en) |
| CA (1) | CA918554A (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3817075A (en) * | 1973-03-01 | 1974-06-18 | Tapco Products Co | Sheet metal brake |
| US3859834A (en) * | 1972-10-16 | 1975-01-14 | Robert Riley | Manually operated corner bending device |
| US3877279A (en) * | 1972-10-30 | 1975-04-15 | Mark Products Corp Van | Sheet metal brake |
| US3913370A (en) * | 1973-10-05 | 1975-10-21 | Douglas G Break | Supplemental bending attachment for portable sheet material bending brake |
| FR2442086A1 (en) * | 1978-11-27 | 1980-06-20 | Tapco Products Co | FOLDING JAW OF A SHEET MATERIAL |
| US4237716A (en) * | 1979-02-23 | 1980-12-09 | Van Mark Products Corporation | Sheet metal brake with improved locking mechanism |
| US4351176A (en) * | 1980-04-24 | 1982-09-28 | Carl Anderson | Bending brake hemmer |
| US4364254A (en) * | 1980-09-08 | 1982-12-21 | Tapco Products Company, Inc. | Combined sheet bending brake, table and coil support |
| US4489583A (en) * | 1982-03-18 | 1984-12-25 | Tapco Products Company, Inc. | Portable sheet bending brake |
| US4494397A (en) * | 1982-03-18 | 1985-01-22 | Tapco Products Company, Inc. | Portable sheet bending brake |
| US4592518A (en) * | 1982-02-26 | 1986-06-03 | Tapco Products Company, Inc. | Coil holder |
| US4651553A (en) * | 1982-03-18 | 1987-03-24 | Tapco Products Company, Inc. | Portable sheet bending brake |
| US4671094A (en) * | 1985-10-28 | 1987-06-09 | Tapco Products Company, Inc. | Portable sheet bending brake |
| US5353620A (en) * | 1993-08-25 | 1994-10-11 | Tapco Products Company, Inc. | Portable sheet bending brake |
| US5505069A (en) * | 1994-06-06 | 1996-04-09 | Tapco International Corporation | Sheet bending brake |
| US5582053A (en) * | 1994-09-22 | 1996-12-10 | Tapco International Corporation | Combined portable sheet bending brake and cutter |
| US5657662A (en) * | 1995-07-25 | 1997-08-19 | Kariofyllis; Daniel | Bending brake platform |
| US5706692A (en) * | 1996-03-06 | 1998-01-13 | Tapco International Corporation | Combined portable sheet bending brake, coil holder and cut-off mechanism |
| US6038909A (en) * | 1998-07-17 | 2000-03-21 | Zink; Joe M. | Portable sheet metal brake |
| US6389864B1 (en) | 1991-11-26 | 2002-05-21 | Tapco International Corporation | Heavy duty sheet bending brake |
| US6571594B2 (en) | 2001-11-02 | 2003-06-03 | Tapco International, Inc. | Open back brake |
-
1968
- 1968-03-04 US US710326A patent/US3559444A/en not_active Expired - Lifetime
-
1969
- 1969-02-11 CA CA042615A patent/CA918554A/en not_active Expired
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859834A (en) * | 1972-10-16 | 1975-01-14 | Robert Riley | Manually operated corner bending device |
| US3877279A (en) * | 1972-10-30 | 1975-04-15 | Mark Products Corp Van | Sheet metal brake |
| US3817075A (en) * | 1973-03-01 | 1974-06-18 | Tapco Products Co | Sheet metal brake |
| US3913370A (en) * | 1973-10-05 | 1975-10-21 | Douglas G Break | Supplemental bending attachment for portable sheet material bending brake |
| FR2442086A1 (en) * | 1978-11-27 | 1980-06-20 | Tapco Products Co | FOLDING JAW OF A SHEET MATERIAL |
| US4240279A (en) * | 1978-11-27 | 1980-12-23 | Tapco Products Company, Inc. | Sheet metal brake |
| US4237716A (en) * | 1979-02-23 | 1980-12-09 | Van Mark Products Corporation | Sheet metal brake with improved locking mechanism |
| US4351176A (en) * | 1980-04-24 | 1982-09-28 | Carl Anderson | Bending brake hemmer |
| US4364254A (en) * | 1980-09-08 | 1982-12-21 | Tapco Products Company, Inc. | Combined sheet bending brake, table and coil support |
| US4592518A (en) * | 1982-02-26 | 1986-06-03 | Tapco Products Company, Inc. | Coil holder |
| US4651553A (en) * | 1982-03-18 | 1987-03-24 | Tapco Products Company, Inc. | Portable sheet bending brake |
| US4489583A (en) * | 1982-03-18 | 1984-12-25 | Tapco Products Company, Inc. | Portable sheet bending brake |
| US4494397A (en) * | 1982-03-18 | 1985-01-22 | Tapco Products Company, Inc. | Portable sheet bending brake |
| US4671094A (en) * | 1985-10-28 | 1987-06-09 | Tapco Products Company, Inc. | Portable sheet bending brake |
| US6389864B1 (en) | 1991-11-26 | 2002-05-21 | Tapco International Corporation | Heavy duty sheet bending brake |
| US5353620A (en) * | 1993-08-25 | 1994-10-11 | Tapco Products Company, Inc. | Portable sheet bending brake |
| US5505069A (en) * | 1994-06-06 | 1996-04-09 | Tapco International Corporation | Sheet bending brake |
| US5582053A (en) * | 1994-09-22 | 1996-12-10 | Tapco International Corporation | Combined portable sheet bending brake and cutter |
| US5706693A (en) * | 1994-09-22 | 1998-01-13 | Tapco International Corporation | Combined sheet bending brake and cutter |
| US5657662A (en) * | 1995-07-25 | 1997-08-19 | Kariofyllis; Daniel | Bending brake platform |
| US5706692A (en) * | 1996-03-06 | 1998-01-13 | Tapco International Corporation | Combined portable sheet bending brake, coil holder and cut-off mechanism |
| US6038909A (en) * | 1998-07-17 | 2000-03-21 | Zink; Joe M. | Portable sheet metal brake |
| US6571594B2 (en) | 2001-11-02 | 2003-06-03 | Tapco International, Inc. | Open back brake |
| US20030188561A1 (en) * | 2001-11-02 | 2003-10-09 | Clark Michael C. | Open back brake |
| US6802198B2 (en) * | 2001-11-02 | 2004-10-12 | Tapco International, Inc. | Open back brake |
Also Published As
| Publication number | Publication date |
|---|---|
| CA918554A (en) | 1973-01-09 |
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