US3623442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knurled closure
Assignee: Alcoa Corp
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Filing: 1969-03-14
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Granted: 1971-11-30
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Expires: 1989-03-14
Abstract
Abstract A method of forming an annular knurled band on two surfaces of a container closure by providing a generally cylindrical closure shell having a top panel and a depending annular skirt. Forming a plurality of outwardly directed knurled portions within a plurality of first circumferential arcs by outwardly reforming the arcs to establish in each knurled section a lower portion extending radially outwardly from the annular skirt and an upper portion formed as a continuous extension of the lower portion, extending upwardly and outwardly from the top panel. Forming a plurality of inwardly directed knurl portions in second circumferential arcs in alternating position with the outwardly directed knurl portions by restraining the second arcs against outward movement. The closure having both the outwardly directed and the inwardly directed knurled portions each of substantially uniform transverse width throughout their longitudinal extent. The knurling originates within the upper half of the skirt and terminates at its uppermost level in the upper panel.
Inventors
- 👤 Wilburn Coy Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:52
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/44; B65; B65D; B65D41/00; B65D41/02; B65D41/04; B65D41/0485; Y; Y10; Y10S; Y10S72/00; Y10S72/703
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
204 words
A method of foRming a knurled container closure comprising providing a generally cylindrical closure shell having a top panel and a depending annular skirt, forming a plurality of continuous outwardly directed knurled portions each within one of a plurality of first circumferential arcs all of substantially the same size by outwardly reforming said first arcs to establish in each said knurled portion a lower sector extending radially outwardly from said annular skirt to a diameter greater than the original diameter of said skirt and up upper sector formed continuously with said lower sector extending upwardly and radially inwardly into said top panel, forming a plurality of continuous inwardly directed knurled portions each within one of a plurality of second circumferential arcs all of substantially the same size and disposed in circumferentially alternating positions with respect to said first arcs by restraining said second arcs against substantial outward deformation during formation of said outwardly directed knurled portions, forming the lower extremities of said outwardly and inwardly directed knurled portions within the upper one-half of said depending annular skirt, and forming the upper extremities of said outwardly and inwardly directed knurled portions within said top panel spaced radially outwardly from the center of said top panel.
Claim 2
Independent Claim
204 words
A method of foRming a knurled container closure comprising providing a generally cylindrical closure shell having a top panel and a depending annular skirt, forming a plurality of continuous outwardly directed knurled portions each within one of a plurality of first circumferential arcs all of substantially the same size by outwardly reforming said first arcs to establish in each said knurled portion a lower sector extending radially outwardly from said annular skirt to a diameter greater than the original diameter of said skirt and up upper sector formed continuously with said lower sector extending upwardly and radially inwardly into said top panel, forming a plurality of continuous inwardly directed knurled portions each within one of a plurality of second circumferential arcs all of substantially the same size and disposed in circumferentially alternating positions with respect to said first arcs by restraining said second arcs against substantial outward deformation during formation of said outwardly directed knurled portions, forming the lower extremities of said outwardly and inwardly directed knurled portions within the upper one-half of said depending annular skirt, and forming the upper extremities of said outwardly and inwardly directed knurled portions within said top panel spaced radially outwardly from the center of said top panel.
Claim 3
Dependent Claim
79 words
The method of claim 1 including forming said outwardly directed knurled portions by outward thinning deformation of said first arcs, said first circumferential arcs occupying about 10 to 20 percent of the total circumference of said closure shell, said second circumferential arcs occupying about 80 to 90 percent of the total circumference of said closure shell, and forming a torque-removable closure by establishing inwardly directed container-engaging means within said closure skirt below said outwardly and inwardly directed knurled portions.
Claim 4
Dependent Claim
67 words
The method of claim 2 including forming said outwardly and inwardly directed knurled portions sequentially around the circumference of said shell, forming all parts of each individual said knurled portion substantially simultaneously, forming each said outwardly directed knurled portion with a substantially uniform transverse width throughout its continuous length, and forming each said inwardly directed knurled portion with a substantially uniform transverse width throughout its continuous length.
Claim 5
Dependent Claim
37 words
The method of claim 2 including forming said outwardly directed knurled portions with a varying height with a maximum height of about 0.020 to 0.030 inch being effected intermediate the ends of said outwardly directed knurled portion.
Claim 6
Dependent Claim
67 words
The method of claim 4 including forming each said outwardly and inwardly disposed knurled portion with an origin disposed within the upper one-quarter of said closure shell, and forming each said outwardly and inwardly disposed knurled portion with a vertically upwardly directed portion adjacent its origin and having an upwardly and radially inwardly directed curved portion connecting therewith terminating at the uppermost level of said knurled portions.
Claim 7
Dependent Claim
71 words
The method of claim 4 including forming each said first circumferential arc into one said outwardly directed knurled portion of generally V-shaped hollow transverse cross-sectional configuration, simultaneously restraining said second circumferential arcs disposed immediately adjacent said first circumferential arcs against outward movement to establish a substantially flat inwardly directed knurled portion, and forming said outwardly directed knurled portions with a transverse width less than that of said inwardly directed knurled portions.
References Cited (Backward Citations)
US1495722A
Cited
US1667003A
Cited
US1481960A
Cited
US1810706A
Cited
US1900880A
Cited
US2664229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |