Patent US3916958A successfully refreshed from Google Patents.
US3916958A
Expired / Lapsed
US
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Process and apparatus for producing a barbed spiral
Assignee: FRIEDRICH GRAEPEL U Co KG A GERMAN JOINT STOCK Co GmbH
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Filing: 1974-09-23
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Granted: 1975-11-04
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Expires: 1994-09-23
Abstract
Abstract A process and apparatus for producing a barbed spiral from a flat metallic barbed strip having a series of barbs and a supporting wire wherein the wire and metallic strip are combined in envelope rollers so that the wire is embedded into a flat metallic strip. At the output of the envelope rollers is a reel for winding the wire supported strip in convolutions so that every other barb of adjacent convolutions can be connected together to form a spiral fence when the assembly is opened in a longitudinal direction. The invention includes a plurality of circumferentially spaced-apart clamping devices which are mounted on a rotary table which rotates synchronously with respect to the reel. There is provided a means for lowering the reel corresponding to the rise of the winding with respect to the rotary table and the output of the envelope rollers. Fingers are also provided for compressing the convolutions on the reel as they are being gathered.
Inventors
- 👤 Siegfried Uhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:15
CPC Classifications
B; B21; B21F; B21F25/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
131 words
A process for producing a barbed spiral from a flat metallic barbed strip having a series of barbs and a supporting wire comprising the steps of: winding the wire-supported strip in a spiral with successive convolutions which are juxtaposed in the longitudinal direction of the spiral by feeding said strip onto a reel wherein the spiral has an odd number of connecting points uniformly distributed over the periphery of said spiral; during the winding step, connecting said wire supported strip which is being fed to the reel with a previously wound of said convolutions at a second next point of said odd number of connecting points, resulting in juxtaposed of said convolutions of said spiral being connected so that the spiral is extendable in a longitudinal direction in an accordian-like manner.
Claim 2
Dependent Claim
131 words
A process for producing a barbed spiral from a flat metallic barbed strip having a series of barbs and a supporting wire comprising the steps of: winding the wire-supported strip in a spiral with successive convolutions which are juxtaposed in the longitudinal direction of the spiral by feeding said strip onto a reel wherein the spiral has an odd number of connecting points uniformly distributed over the periphery of said spiral; during the winding step, connecting said wire supported strip which is being fed to the reel with a previously wound of said convolutions at a second next point of said odd number of connecting points, resulting in juxtaposed of said convolutions of said spiral being connected so that the spiral is extendable in a longitudinal direction in an accordian-like manner.
Claim 3
Dependent Claim
64 words
The process according to claim 1 wherein the supported barbed strip is wound up with its barbed strip surface at right angles to the spiral longitudinal axis whereby those portions of the barbed strip carrying the barbs cover one another in the longitudinal direction of the spiral and the connecting members are placed in the space between the barbed strip portions carrying the barbs.
Claim 4
Independent Claim
117 words
An apparatus for producing a barbed spiral from a flat metallic barbed strip having a series of barbs and a supporting wire comprising: a first supply feed for feeding a supporting wire; a second supply feed for feeding the flat metallic strip; envelope rollers receiving the strip and the wire and embedding the wire into the flat metallic strip; a reel at the output of the envelope rollers for winding the wire supported strip in convolutions which are juxtaposed in the longitudinal direction of the spiral; and connecting means for coupling connecting members on every other barb of adjacent convolutions of the spiral so that the spiral is extendable in a longitudinal direction in an accordion-like manner.
Claim 5
Independent Claim
117 words
An apparatus for producing a barbed spiral from a flat metallic barbed strip having a series of barbs and a supporting wire comprising: a first supply feed for feeding a supporting wire; a second supply feed for feeding the flat metallic strip; envelope rollers receiving the strip and the wire and embedding the wire into the flat metallic strip; a reel at the output of the envelope rollers for winding the wire supported strip in convolutions which are juxtaposed in the longitudinal direction of the spiral; and connecting means for coupling connecting members on every other barb of adjacent convolutions of the spiral so that the spiral is extendable in a longitudinal direction in an accordion-like manner.
Claim 6
Dependent Claim
34 words
The apparatus according to claim 3 wherein said connecting means comprises a plurality of circumferentially spaced-apart clamping devices corresponding in number to the number of connecting points for connecting the convolutions of the spiral.
Claim 7
Dependent Claim
140 words
The apparatus according to claim 4 wherein each clamping device comprises a pair of legs having extending power arms, expanding levers having one end pivotably coupled to the power arms, a common forK coupled to the opposite ends of said levers, a piston having a piston rod connected to said common fork, a clamping head coupled to said pair of legs and including a collecting jaw for receiving a pair of convolutions of the barbed spiral, a compression spring tensioning the head with respect to the common fork, so that when a fluid under pressure is applied to one side of said piston, the pair of legs close a connecting member over a pair of convolutions and when the pressure is applied to the other side of the piston, the legs open to release the connecting member and are retracted.
Claim 8
Dependent Claim
26 words
The apparatus according to claim 4 additionally comprising a rotary table surrounding the reel and supporting said clamping devices, said table rotating synchronously with said reel.
Claim 9
Dependent Claim
32 words
The apparatus according to claim 6 comprising means for lowering the reel corresponding to the rise of the winding proportionally to the rotary table and the stationary output of the envelope rollers.
Claim 10
Dependent Claim
29 words
The apparatus according to claim 6 comprising fingers mounted on the rotary table between said clamping devices for pivoting into and out of the winding circle of said reel.
Claim 11
Dependent Claim
25 words
The apparatus according to claim 8 in which the pivoting in and out takes place in a plane containing the rotational axis of said reel.
Claim 12
Dependent Claim
41 words
The apparatus according to claim 9 wherein each finger is carried by a swivel arm and includes a spring catch with a top abutment so that upon swinging back, its swivel arm can fall back and remain on the barbed strip.
Claim 13
Dependent Claim
22 words
The apparatus according to claim 8 wherein said fingers are arranged in close proximity behind each clamping device in the rotational direction.
Claim 14
Dependent Claim
36 words
The apparatus according to claim 3 comprising drive means coupled to said reel and said envelope rollers so that the reel rotates slightly faster than the envelope rollers causing the strip to slip on the reel.
Claim 15
Dependent Claim
35 words
The apparatus according to claim 3 wherein the winding capacity of the reel is an integral multiple of the spacing of the barbed strip portions carrying the barbs divided by the number of clamping devices.
Claim 16
Dependent Claim
35 words
The apparatus according to claim 3 wherein said reel is formed by coaxially positioned web ribs distributed over the periphery so that they engage in the gaps between the barbed strip portions carrying the barbs.
References Cited (Backward Citations)
US3155374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |