US3673838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous forming of transverse stiffening ribs on strip material
Assignee: BROWNBUILT Ltd
•
Filing: 1970-01-29
•
Granted: 1972-07-04
•
Expires: 1990-01-29
Abstract
Abstract Method of and machine for forming transverse ribs in metal strip wherein the strip is fed through a pair of back tension rolls, over a die roll having a series of elliptical shaped recesses extending transversely of and around the periphery of the die roll, a series of rotary punch rolls engaging the strip on the die roll and deforming the strip into the recesses, a forward tension roll engaging the deformed strip on the die roll and controlling the feed out of strip from the machine, the back tension rolls and the forward tension roll being driven by gearing providing a speed differential between these rolls and thus indicating tension in the strip as it passes over the die roll.
Inventors
- 👤 Philip George Clempson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:58
CPC Classifications
B; B21; B21D; B21D13/00; B21D13/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
117 words
A forming machine for continuously forming transverse ribs in a metal strip, comprising strip back tension rolls, a die roll arranged parallel to and spaced from said back tension rolls and having a series of recesses arranged around its peripheral surface, at least one rotary punch roll arranged so as to be in forming engagement with the strip passing over the die roll, and a forward tension roll arranged so as to be in frictional engagement with the formed strip and the die roll, said back tension rolls and the forward tension roll having a drive arrangement providing a speed differential therebetween so as to induce tension in the strip as it passes over the die roll.
Claim 2
Dependent Claim
117 words
A forming machine for continuously forming transverse ribs in a metal strip, comprising strip back tension rolls, a die roll arranged parallel to and spaced from said back tension rolls and having a series of recesses arranged around its peripheral surface, at least one rotary punch roll arranged so as to be in forming engagement with the strip passing over the die roll, and a forward tension roll arranged so as to be in frictional engagement with the formed strip and the die roll, said back tension rolls and the forward tension roll having a drive arrangement providing a speed differential therebetween so as to induce tension in the strip as it passes over the die roll.
Claim 3
Dependent Claim
24 words
A machine according to claim 1 wherein the peripheral surfaces of the back tension rolls and the forward tension roll are of elastomer material.
Claim 4
Dependent Claim
25 words
A machine according to claim 1 wherein a plurality of rotary punch rolls are provided around a section of the periphery of the die roll.
Claim 5
Dependent Claim
45 words
A machine according to claim 3 wherein the rotary punch rolls are each provided with at least one punch member, the dimensions of the punches varying between the first punch roll and the last punch roll so as to form the ribs by gradual deformation.
Claim 6
Dependent Claim
30 words
A machine according to claim 4 wherein the punch rolls are provided with back-up rolls so as to counteract any tendency of the punch rolls to deflect under forming pressure.
Claim 7
Dependent Claim
59 words
A machine according to claim 1 wherein the drive arrangement comprises a variable speed motor driving the die roll which is in driving engagement with the back tension rolls, forward tension roll and rotary punch roll or rolls by means of gear pinions, said drive from the die roll to the back tension rolls also incorporating a slipping clutch.
Claim 8
Dependent Claim
39 words
A machine according to claim 1 wherein the back tension rolls are adjustably mounted with respect to each other and the forward tension roll and rotary punch roll or rolls are adjustably mounted with respect to the die roll.
Claim 9
Dependent Claim
37 words
A machine according to claim 1 wherein the die roll recesses are of elliptical or diamond shape having their greatest depth at the center and reducing in depth and width towards the sides of the die roll.
Claim 10
Dependent Claim
48 words
A machine according to claim 7 and including an additional nip roll located between the rotary punch roll or rolls and the forward tension roll so as to engage against the formed strip on the die roll and induce additional friction between the strip and the die roll.
Claim 11
Dependent Claim
48 words
A machine according to claim 7 and including an additional nip roll located between the rotary punch roll or rolls and the back tension roll so as to engage against the formed strip on the die roll and induce additional friction between the strip and the die roll.
Claim 12
Dependent Claim
48 words
A machine according to claim 7, including additional nip rolls located between the rotary punch roll or rolls and the forward and back tension rolls so as to engage against the formed strip on the die roll and induce additional friction between the strip and the die roll.
Claim 13
Independent Claim
92 words
A method of continuously forming transverse ribs in metal strip comprising the steps of feeding the strip through a transverse rib forming machine, applying tension to the strip over a die roll in the machine by applying a controlled speed differential between input and output rolls of the machine, and rotary punch forming ribs in the strip at a region of said applied tension by a plurality of punch rolls arranged in forming engagement with and around a peripheral section of the die roll and synchronized for rotation with said die roll.
Claim 14
Independent Claim
92 words
A method of continuously forming transverse ribs in metal strip comprising the steps of feeding the strip through a transverse rib forming machine, applying tension to the strip over a die roll in the machine by applying a controlled speed differential between input and output rolls of the machine, and rotary punch forming ribs in the strip at a region of said applied tension by a plurality of punch rolls arranged in forming engagement with and around a peripheral section of the die roll and synchronized for rotation with said die roll.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |