Patent US3851812A successfully refreshed from Google Patents.
US3851812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Force fit plastic closure
Assignee: Weatherchem Corp
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Filing: 1974-01-21
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Granted: 1974-12-03
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Expires: 1994-01-21
Abstract
Abstract A dispensing container is disclosed which includes a fiber tube, a bottom end closure, and a top end closure which is self-locking on the fiber tube. The self-locking top end closure includes an annular skirt portion which is received in the tube and a cantilever fin which projects radially outwardly from the skirt portion. The fin is molded in a normal radially outwardly extending position and is rotatable about its fixed end into an adjacent recess in the skirt portion for permitting straight line axial removal of the top end closure from its mold. When the top end closure is assembled on the fiber tube, the fin is rotatable about its fixed end in the other direction from its normal position and is wedged between the skirt portion and the fiber tube to hold the top end closure on the fiber tube. A mold for making the top end closure is also disclosed which permits removal of the top end closure from the mold by straight line axial movement without requiring relative radial movement of portions of the mold.
Inventors
- 👤 P Bittel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:13
CPC Classifications
B; B65; B65D; B65D15/00; B65D15/02; B65D15/04; B65D15/08; B65D47/00; B65D47/04; B65D47/20; B65D47/26; B65D47/261; B65D47/265
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
129 words
A single piece integral plastic end closure for a tube comprising a laterally extending end portion, an annular skirt portion extending axially from said end portion, said skirt portion having a generally cylindrical outer surface for being received within said tube, and a cantilever fin having a fixed end on said outer surface of said skirt portion remote from said end portion and a free end, said fin being rotatable about said fixed end in one direction from a normal radially outwardly extending position to a mold ejecting position extending axially away from said end portion, and said fin being rotatable about said fixed end in another direction opposite said first direction from said normal radially outWardly extending position to a locking position extending axially toward said end portion.
Claim 2
Dependent Claim
129 words
A single piece integral plastic end closure for a tube comprising a laterally extending end portion, an annular skirt portion extending axially from said end portion, said skirt portion having a generally cylindrical outer surface for being received within said tube, and a cantilever fin having a fixed end on said outer surface of said skirt portion remote from said end portion and a free end, said fin being rotatable about said fixed end in one direction from a normal radially outwardly extending position to a mold ejecting position extending axially away from said end portion, and said fin being rotatable about said fixed end in another direction opposite said first direction from said normal radially outWardly extending position to a locking position extending axially toward said end portion.
Claim 3
Dependent Claim
52 words
An end closure as defined in claim 1 wherein said outer surface of said skirt portion is recessed radially inwardly at a location adjacent said fin when said fin is in said mold ejecting position, and said fin is received within said recess when said fin is in said mold ejecting position.
Claim 4
Dependent Claim
46 words
An end closure as defined in claim 2 including a plurality of fins substantially identical to said first mentioned fin and a plurality of recesses substantially identical to said first mentioned recess, and said fins are circumferentially spaced about said outer surface of said skirt portion.
Claim 5
Dependent Claim
22 words
An end closure as defined in claim 2 wherein each of said fins extend circumferentially through an arc of about 5* .
Claim 6
Dependent Claim
18 words
An end closure as defined in claim 4 wherein said fins are circumferentially spaced apart by about 10*.
Claim 7
Dependent Claim
53 words
An end closure as defined in claim 2 wherein each of said fins is serrated and said outer surface of said skirt portion is serrated, and said fin and outer surface serrations engage to prevent axial movement of said fin relative to said outer surface when said fin is in said locking position.
Claim 8
Dependent Claim
130 words
In combination, an end closure and a fiber tube, said fiber tube including a generally cylindrical inner surface, and said end closure being plastic and including a laterally extending end portion, an annular skirt portion extending axially from said end portion, said skirt portion having a generally cylindrical outer surface received within said tube inner surface, and a cantilever fin having a fixed end on said outer surface of said skirt portion remote from said end portion and a free end, said fin being integral with said skirt portion and being folded from a normal radially outwardly extending position to a folded axially extending position between said outer surface of said skirt portion and said inner surface of said tube whereby said fin secures said end closure on said tube.
Claim 9
Dependent Claim
130 words
In combination, an end closure and a fiber tube, said fiber tube including a generally cylindrical inner surface, and said end closure being plastic and including a laterally extending end portion, an annular skirt portion extending axially from said end portion, said skirt portion having a generally cylindrical outer surface received within said tube inner surface, and a cantilever fin having a fixed end on said outer surface of said skirt portion remote from said end portion and a free end, said fin being integral with said skirt portion and being folded from a normal radially outwardly extending position to a folded axially extending position between said outer surface of said skirt portion and said inner surface of said tube whereby said fin secures said end closure on said tube.
Claim 10
Dependent Claim
48 words
The combination defined in claim 7 wherein said outer surface of said skirt portion is recessed radially inwardly at a location adjacent said normal position of said fin whereby said fin is folded radially inwardly into said recess when said end closure is removed from its mold cavity.
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 |