US3664170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curving method and apparatus for ridged sheet material
Assignee: Pacific Roller Die Co Inc
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Filing: 1970-03-16
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Granted: 1972-05-23
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Expires: 1990-03-16
Abstract
Abstract Method and apparatus for forming ridged sheet material into arcuate shape. Sheet material having an elongated major ridge or corrugation extending along a line is curved along said line by progressive formation therealong of a series of corrugations or pleats directed substantially normal to said line.
Inventors
- 👤 Paul K Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:24
CPC Classifications
B; B21; B21D; B21D13/00; B21D13/02
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
186 words
A method of curving sheet material having at least one elongated ridge, to form an arc therein in the direction of extent of said ridge, comprising: a. providing a corrugating station; b. relatively moving said sheet material and said corrugating station along the longitudinal axis of said ridge; c. progressively forming along said ridge a series of corrugations of predetermined depth, said corrugations each being directed transversely of said ridge; d. at saId corrugating station said corrugations each being formed by: 1. supporting said material at the surface thereof external to said arc to be formed therein against a first die surface, 2. supporting said material at said surface thereof against a second die surface spaced from said first die surface along said axis, 3. intercepting the opposite surface of said material and deforming said material against the said surfaces with a punch surface located therebetween, and e. thereafter releasing said material by moving said punch surface and at least one of said die surfaces from said material in opposite directions normal to said axis for a distance at least as great as said predetermined depth.
Claim 2
Independent Claim
186 words
A method of curving sheet material having at least one elongated ridge, to form an arc therein in the direction of extent of said ridge, comprising: a. providing a corrugating station; b. relatively moving said sheet material and said corrugating station along the longitudinal axis of said ridge; c. progressively forming along said ridge a series of corrugations of predetermined depth, said corrugations each being directed transversely of said ridge; d. at saId corrugating station said corrugations each being formed by: 1. supporting said material at the surface thereof external to said arc to be formed therein against a first die surface, 2. supporting said material at said surface thereof against a second die surface spaced from said first die surface along said axis, 3. intercepting the opposite surface of said material and deforming said material against the said surfaces with a punch surface located therebetween, and e. thereafter releasing said material by moving said punch surface and at least one of said die surfaces from said material in opposite directions normal to said axis for a distance at least as great as said predetermined depth.
Claim 3
Dependent Claim
21 words
supporting said material at said surface thereof against a second die surface spaced from said first die surface along said axis,
Claim 4
Dependent Claim
21 words
supporting said material at said surface thereof against a second die surface spaced from said first die surface along said axis,
Claim 5
Dependent Claim
24 words
The method of claim 1, including: f. forming said corrugations regularly spaced along said ridge, for curving said sheet material about a single point.
Claim 6
Dependent Claim
17 words
a die assembly at the opposite side of said strip in opposed relationship to said punch member,
Claim 7
Dependent Claim
17 words
a die assembly at the opposite side of said strip in opposed relationship to said punch member,
Claim 8
Dependent Claim
22 words
supporting same at said surface thereof against the surface of a second die element reciprocable in directions normal to said path, and
Claim 9
Dependent Claim
22 words
supporting same at said surface thereof against the surface of a second die element reciprocable in directions normal to said path, and
Claim 10
Dependent Claim
84 words
intermittently intercepting said path at a point between said spaced points from the side thereof internal of said arc to be formed in said strip with a surface of a corrugating element reciprocable in directions normal to said path; and e. thereafter releasing said portions by retracting at least said first die element and said corrugating element in opposite directions normal to said path for a distance at least as great as said predetermined depth for permitting advancement of succeeding portions along said path.
Claim 11
Dependent Claim
84 words
intermittently intercepting said path at a point between said spaced points from the side thereof internal of said arc to be formed in said strip with a surface of a corrugating element reciprocable in directions normal to said path; and e. thereafter releasing said portions by retracting at least said first die element and said corrugating element in opposite directions normal to said path for a distance at least as great as said predetermined depth for permitting advancement of succeeding portions along said path.
Claim 12
Dependent Claim
22 words
said punch member having a punch surface arcuately shaped transversely of said path for forming said corrugation transversely in said ridge, and
Claim 13
Dependent Claim
22 words
said punch member having a punch surface arcuately shaped transversely of said path for forming said corrugation transversely in said ridge, and
Claim 14
Independent Claim
99 words
A method of curving an elongated strip having at least one rounded ridge extending longitudinally of said strip between opposite ends of said strip, to form an arc therein in the direction of extent of said ridge, comprising: a. supporting said strip for movement along a longitudinal path of travel; b. providing a corrugating station at a location along said path; c. intermittently longitudinally advancing said strip to position successive portions of said strip at said corrugating station; and d. at said corrugating station forming corrugations in each of said successive portions of said ridge, extending transversely thereof by;
Claim 15
Independent Claim
99 words
A method of curving an elongated strip having at least one rounded ridge extending longitudinally of said strip between opposite ends of said strip, to form an arc therein in the direction of extent of said ridge, comprising: a. supporting said strip for movement along a longitudinal path of travel; b. providing a corrugating station at a location along said path; c. intermittently longitudinally advancing said strip to position successive portions of said strip at said corrugating station; and d. at said corrugating station forming corrugations in each of said successive portions of said ridge, extending transversely thereof by;
Claim 16
Dependent Claim
61 words
intercepting the opposite surface of said material and deforming said material against the said surfaces with a punch surface located therebetween, and e. thereafter releasing said material by moving said punch surface and at least one of said die surfaces from said material in opposite directions normal to said axis for a distance at least as great as said predetermined depth.
Claim 17
Dependent Claim
61 words
intercepting the opposite surface of said material and deforming said material against the said surfaces with a punch surface located therebetween, and e. thereafter releasing said material by moving said punch surface and at least one of said die surfaces from said material in opposite directions normal to said axis for a distance at least as great as said predetermined depth.
Claim 18
Dependent Claim
23 words
said die assembly including a portion retractable in a direction normal to said path a distance at least as great as said depth.
Claim 19
Dependent Claim
23 words
said die assembly including a portion retractable in a direction normal to said path a distance at least as great as said depth.
Claim 20
Dependent Claim
118 words
Apparatus for curving an elongated strip having a rounded ridge extending longitudinally of said strip, to form an arc therein in the direction of extent of said ridge, comprising: a. support means for supporting said strip for movement in a path along the longitudinal axis of said strip; b. corrugating means positioned at a point along said path adapted for forming a corrugation of predetermined depth in said ridge transversely thereof; c. Feed means for intermittently advancing said strip along said path and positioning said portions of said ridge at said point; d. actuating means for actuating said corrugating means for forming a corrugation in each of said successive portions of said ridge; e. said corrugating means including,
Claim 21
Dependent Claim
118 words
Apparatus for curving an elongated strip having a rounded ridge extending longitudinally of said strip, to form an arc therein in the direction of extent of said ridge, comprising: a. support means for supporting said strip for movement in a path along the longitudinal axis of said strip; b. corrugating means positioned at a point along said path adapted for forming a corrugation of predetermined depth in said ridge transversely thereof; c. Feed means for intermittently advancing said strip along said path and positioning said portions of said ridge at said point; d. actuating means for actuating said corrugating means for forming a corrugation in each of said successive portions of said ridge; e. said corrugating means including,
Claim 22
Dependent Claim
56 words
The apparatus of claim 4, wherein: f. said die assembly includes a die member reciprocable in directions normal to said path for positioning against the surface of said ridge at said opposite side of said strip during said forming and retraction therefrom For a distance at least as great as said depth prior to said advancing.
Claim 23
Dependent Claim
48 words
The apparatus of claim 5, including: g. at least one reciprocable wedge member engageable with sad die member for alternately positively moving said die member into position against said surface of said ridge and permitting retraction therefrom; and h. means for imparting reciprocating motion to said wedge member.
Claim 24
Dependent Claim
122 words
The apparatus of claim 5, including: g. means for imparting reciprocating motion to said die member in said directions normal to said path; h. a stationary member at each of two opposite sides of said die member in slidable contact therewith; i. a source of lubricating fluid; j. at least one aperture defined in said die member having a fixed dimension normal to the directions of movement thereof; k. a conduit for conducting said fluid to within said aperture including a stationary conduit portion within said aperture substantially coextensive with said fixed dimension; l. said fluid being positively urged between opposed surfaces of said stationary members and said die member by said reciprocating motion of said die member for lubricating said surfaces.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |