US4084488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming pleated closure construction
Assignee: Phillips Petroleum Co
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Filing: 1975-11-10
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Granted: 1978-04-18
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Expires: 1995-11-10
Abstract
Abstract A closure member constructed from a single flat blank and having an annular flange extending from a flat central portion, the outer surface of the annular flange being substantially continuous, is provided by forming a plurality of pleats running generally perpendicular to the perimeter of the flange andprojecting toward the inside of the annular flange.
Inventors
- 👤 Alfred W. Kinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:43
CPC Classifications
B; B31; B31B; B31B70/00; B31B50/00; B31B50/59; B31B50/592; B31B2160/00; B31B2160/10
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
233 words
Apparatus for converting a substantially flat blank into a closure member having an annular flange folded to extend from a central portion, the inner surface of the flange having at preselected locations inwardly protruding pleats formed therein extending generally perpendicular to the perimeter of the flange, the outer surface of the flange being substantially smooth and continuous with substantially the only irregularities in the otherwise smooth outer surface of the flange being hairlines each of which coincides with the location of a respective one of said pleats on the inner surface of said flange, the outer surface of said flange providing said closure member with improved capability for mating with and sealing to a corresponding sidewall member, comprising: an annular die ring means having a substantially smooth inner surface; plunger means having an annular external surface located adjacent a leading end thereof and sized to cooperate with said inner surface of said die ring means, said external surface of said plunger means having a plurality of grooves formed on the surface thereof, the central axis of each said groove being substantially coplanar with the central axis of said annular external surface of said plunger means; and means for inserting said leading end of said plunger means into said die ring means so that a flat blank positioned between said plunger means and said annular die ring means is converted to said closure member.
Claim 2
Dependent Claim
233 words
Apparatus for converting a substantially flat blank into a closure member having an annular flange folded to extend from a central portion, the inner surface of the flange having at preselected locations inwardly protruding pleats formed therein extending generally perpendicular to the perimeter of the flange, the outer surface of the flange being substantially smooth and continuous with substantially the only irregularities in the otherwise smooth outer surface of the flange being hairlines each of which coincides with the location of a respective one of said pleats on the inner surface of said flange, the outer surface of said flange providing said closure member with improved capability for mating with and sealing to a corresponding sidewall member, comprising: an annular die ring means having a substantially smooth inner surface; plunger means having an annular external surface located adjacent a leading end thereof and sized to cooperate with said inner surface of said die ring means, said external surface of said plunger means having a plurality of grooves formed on the surface thereof, the central axis of each said groove being substantially coplanar with the central axis of said annular external surface of said plunger means; and means for inserting said leading end of said plunger means into said die ring means so that a flat blank positioned between said plunger means and said annular die ring means is converted to said closure member.
Claim 3
Dependent Claim
60 words
Apparatus in accordance with claim 1 wherein said annular die ring means has an inside diameter D for receiving a discoidal blank having a diameter d, circumference c, and thickness t, the diameter D of said die being smaller than the diameter d of said blank; and wherein the depth of each said groove is less than about 1.3 t.
Claim 4
Dependent Claim
18 words
Apparatus in accordance with claim 2 wherein the depth of each said groove is less than about t.
Claim 5
Dependent Claim
76 words
Apparatus in accordance with claim 1 wherein said annular die ring means has an inside diameter D for receiving a discoidal blank having a diameter d, circumference c, and thickness t, the diameter D of said die being smaller than the diameter d of said blank; and wherein the perimeter of said plunger means measured at a distance (d - D)/2 from said leading end thereof is approximately equal to the circumference c of said blank.
Claim 6
Dependent Claim
56 words
Apparatus in accordance with claim 4 wherein the area of the opening of said annular die ring means exceeds the cross sectional area of said plunger means at a location (d - D)/2 from the leading edge of the plunger by an amount substantially equal to the edge area of said discoidal blank, (c × t).
Claim 7
Dependent Claim
19 words
Apparatus in accordance with claim 5 wherein the depth of each said groove is less than about 1.3 t.
Claim 8
Dependent Claim
18 words
Apparatus in accordance with claim 6 wherein the depth of each said groove is less than about t.
Claim 9
Dependent Claim
46 words
Apparatus in accordance with claim 1 wherein said annular die ring means has an inside diameter D for receiving a discoidal blank having a diameter d, circumference c, and thickness t, the diameter D of said die being smaller than the diameter d of said blank.
Claim 10
Dependent Claim
56 words
Apparatus in accordance with claim 8 wherein the area of the opening of said annular die ring means exceeds the cross sectional area of said plunger means at a location (d - D)/2 from the leading edge of the plunger by an amount substantially equal to the edge area of said discoidal blank, (c × t).
Claim 11
Dependent Claim
19 words
Apparatus in accordance with claim 9 wherein the depth of each said groove is less than about 1.3 t.
Claim 12
Dependent Claim
17 words
Apparatus in accordance with claim 10 wherein the depth of each said groove is less than t.
Claim 13
Dependent Claim
19 words
Apparatus in accordance with claim 8 wherein the depth of each said groove is less than about 1.3 t.
Claim 14
Dependent Claim
18 words
Apparatus in accordance with claim 12 wherein the depth of each said groove is less than about t.
Claim 15
Dependent Claim
15 words
Apparatus in accordance with claim 8 wherein the depth of each said groove is uniform.
Claim 16
Dependent Claim
22 words
Apparatus in accordance with claim 8 wherein the depth of said grooves is decreased toward the leading edge of said plunger means.
Claim 17
Dependent Claim
52 words
Apparatus in accordance with claim 8 wherein the area of the opening of said annular die ring means exceeds the cross sectional area of said plunger means by an amount substantially equal to π(D + 2X)t where X is any distance up to (d-D)/2 from the leading end of said plunger means.
Claim 18
Dependent Claim
34 words
Apparatus in accordance with claim 16 wherein the depth of each said groove at a location approximately (d - D)/2 from the leading end of said plunger means is less than about 1.3 t.
Claim 19
Dependent Claim
33 words
Apparatus in accordance with claim 17 wherein the depth of each said groove at a location approximately (d - D) from the leading end of said plunger means is less than about t.
Claim 20
Independent Claim
200 words
A method for converting a substantially flat closure blank into a closure member having an annular closure flange folded to extend from a central portion, the inner surface of the flange having at preselected locations inwardly protruding pleats formed therein extending generally perpendicular to the perimeter of the flange, the outer surface of the flange being substantially smooth and continuous with substantially the only irregularities in the otherwise smooth outer surface of the flange being hairlines each of which coincides with the location of a respective one of said pleats on the inner surface of said flange, the outer surface of said flange providing said closure member with improved capability for mating with and sealing to a corresponding sidewall member, said method comprising simultaneously: reforming a peripheral portion of a substantially flat closure blank to form an annular flange extending from a central portion of said blank; maintaining the outer surface of said annular flange in contact with an annular surface having the size and at least substantially smooth surface characteristics of the desired closure flange; and shaping inwardly protruding pleats extending generally perpendicular to the perimeter of said flange at preselected locations along the inside of said annular flange.
Claim 21
Independent Claim
200 words
A method for converting a substantially flat closure blank into a closure member having an annular closure flange folded to extend from a central portion, the inner surface of the flange having at preselected locations inwardly protruding pleats formed therein extending generally perpendicular to the perimeter of the flange, the outer surface of the flange being substantially smooth and continuous with substantially the only irregularities in the otherwise smooth outer surface of the flange being hairlines each of which coincides with the location of a respective one of said pleats on the inner surface of said flange, the outer surface of said flange providing said closure member with improved capability for mating with and sealing to a corresponding sidewall member, said method comprising simultaneously: reforming a peripheral portion of a substantially flat closure blank to form an annular flange extending from a central portion of said blank; maintaining the outer surface of said annular flange in contact with an annular surface having the size and at least substantially smooth surface characteristics of the desired closure flange; and shaping inwardly protruding pleats extending generally perpendicular to the perimeter of said flange at preselected locations along the inside of said annular flange.
Claim 22
Dependent Claim
56 words
A method in accordance with claim 19 wherein shaping inwardly protruding pleats at preselected locations along the inside of said flange comprises providing a plurality of spaces of preselected size at regular intervals along said flange into which said pleats can form while maintaining all other portions of said flange in contact with said annular surface.
Claim 23
Dependent Claim
18 words
A method in accordance with claim 20 additionally comprising compressing at least a portion of each said pleat.
Claim 24
Dependent Claim
36 words
A method in accordance with claim 21 wherein compressing each said pleat comprises applying up to about 1% compression to each pleat at the extreme perimeter of said blank forming the edge of said annular flange.
Claim 25
Dependent Claim
15 words
A method in accordance with claim 22 wherein said compression is at least about 0.90%.
Claim 26
Dependent Claim
27 words
A method in accordance with claim 22 wherein compressing each said pleat comprises applying up to about 1% compression along the entire length of each said pleat.
Claim 27
Dependent Claim
15 words
A method in accordance with claim 24 wherein said compression is at least about 0.90%.
References Cited (Backward Citations)
US783889A
Cited
US2180243A
Cited
US2411082A
Cited
US2699274A
Cited
US2832522A
Cited
US3054144A
Cited
US3550421A
Cited
US3344580A
Cited
US3408902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |