US3851362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanded mesh
Assignee: Comalco J&S Pty Ltd
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Filing: 1973-08-20
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Granted: 1974-12-03
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Expires: 1993-08-20
Abstract
Abstract A method of forming expanded mesh which comprises forming an extrusion having a constant cross-sectional shape which includes webs separated by ribs, forming rows in its slots in the webs which overlap one another and are staggered, increasing the width of each slot of the two outermost rows of slots by bending the ribs, engaging the widened slots over the hooks of two rows of hooks of an expanding machine, separating the rows of hooks from one another so as to bend the ribs and expand the slotted extrusion without applying any torsion to the ribs, and at the same time move the hooks in each row towards one another, and then removing the expanded mesh from the hooks.
Inventors
- 👤 H Jury
- 👤 R Howells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:11
CPC Classifications
E; E04; E04H; E04H17/00; E04H17/14; B; B21; B21D; B21D31/00; B21D31/04; B21D31/046; B21D47/00; Y; Y10; Y10T; Y10T29/00; Y10T29/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
A method of forming expanded mesh, comprising: a. extruding extrusile material to form an extrusion having a constant cross-sectional shape which includes ribs separated by webs, b. forming a row of slots in each web so that the slots of each row are staggered with respect to and overlap the slots of at least one adjacent row, c. increasing the width of each slot in each of the two outermost rows of slots by bending at least one of the ribs flanking the respective slot, d. engaging the hooks of two rows of hooks of an expanding machine in respective widened slots of respective said outermost rows of slots, e. separating the rows of hooks from one another so as to bend the ribs and expand the slotted extrusion, and at the same time move the hooks in each row towards one another, and f. removing the expanded mesh from the hooks.
Claim 2
Independent Claim
152 words
A method of forming expanded mesh, comprising: a. extruding extrusile material to form an extrusion having a constant cross-sectional shape which includes ribs separated by webs, b. forming a row of slots in each web so that the slots of each row are staggered with respect to and overlap the slots of at least one adjacent row, c. increasing the width of each slot in each of the two outermost rows of slots by bending at least one of the ribs flanking the respective slot, d. engaging the hooks of two rows of hooks of an expanding machine in respective widened slots of respective said outermost rows of slots, e. separating the rows of hooks from one another so as to bend the ribs and expand the slotted extrusion, and at the same time move the hooks in each row towards one another, and f. removing the expanded mesh from the hooks.
Claim 3
Dependent Claim
127 words
A method according to claim 1 wherein said slots are formed by a series of axially spaced slotting rollers carried on and keyed to a slotting roller shaft which is journalled in bearings in the frame of a slotting machine, said machine also having a spreader finger shaft journalled in bearings in said frame and being parallel to the slotting roller shaft, and having a pair of radially outstanding spreader fingers thereon, the method further comprising simultaneously: a. driving said extrusion in a longitudinal direction past the slotting rollers, b. rotationally driving the slotting roller shaft, and c. rotationally driving the spreader finger shaft to drive the spreader fingers into the slots of the respective outermost rows of slots and thereby effect said increasing of slot width.
Claim 4
Dependent Claim
33 words
A method according to claim 2 further comprising adjusting the spreader fingers on the spreader finger shaft to align them with the respective outermost of said slotting rollers on the slotting roller shaft.
Claim 5
Dependent Claim
87 words
A method according to claim 2 wherein said expanding machine comprises a pair of side rails each having a track extending along it, and the hooks of each said row are each carried on a carriage block having rollers thereon which engage and are supported by a said track, the carriage blocks of each row being interconnected by a flexible line, the method further comprising drawing the lines taut to thereby separate the carriage blocks from one another before engaging the hooks in said respective widened slots.
Claim 6
Dependent Claim
143 words
A method according to claim 2 wherein said expanding machine comprises a pair of side rails, each side rail having a swinging gauge member hinged thereto, the gauge member having cut-outs therein, a track extending along each side rail, a plurality of carriage blocks each having rollers thereon which engage and are supported by a said track, each said hook being on a respective carriage block, the carriage blocks of each row being interconnected by a flexible line, the methoD further comprising: drawing said lines taut to thereby separate the carriage blocks from one another, swinging the gauge member over the carriage blocks so as to position the cut-outs over the hooks when the lines are taut to thereby accurately locate the hooks in a spaced relationship, and retaining the hooks in that spaced relationship while engaging the hooks in respective widened slots.
Claim 7
Dependent Claim
28 words
A method according to claim 5 wherein separating of the rows of hooks away from one another is continued at least until said carriage blocks abut one another.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |