US4028029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retreading mold with bladder for creating annular vacuum gap
Assignee: MACMILLAN LOUISE J
•
Filing: 1976-08-20
•
Granted: 1977-06-07
•
Expires: 1996-08-20
Abstract
Abstract This disclosure relates to retread molds adapted for manual, semi-automatic or full automatic operation and specifically is directed to a pair of relatively movable platens carrying matrix means for receiving a tire therein with bead aligner wheels associated therewith, the bead aligner wheels being in axially opposed relationship to each other, an annular bladder disposed between the platens, the annular bladder having innermost peripheral marginal portions, the marginal portions being in overlying relationship upon the bead aligner wheels, and means for creating an annular gap between a terminal edge of each bladder peripheral marginal portion, an outboard portion of each of the bladder peripheral margins and the associated bead aligner wheel, the annular gap creating means being defined by an annular bead carried by each outboard portion and/or terminal end of each bladder peripheral marginal portion in sealing contact with its associated bead aligner wheel.
Inventors
- 👤 Kenneth T. MacMillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:28
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0654; B29C; B29C43/00; B29C43/02; B29C43/10; B29C43/102; B29C43/104; B29D30/0606; B29D30/52; B29D30/54; B29D2030/0655
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
178 words
A retreading mold comprising a pair of relatively movable platens, matrix means carried by each platen for receiving therein a tire to be retreaded, a bead aligner wheel associated with each platen, said bead aligner wheels being in axially opposed relationship to each other, each bead aligner wheel having means at a periphery for contacting a wheel bead and aligning a tire relative thereto, an annular bladder disposed between said platens, said annular bladder having innermost peripheral marginal portions, said innermost peripheral marginal portions being in overlying relationship upon said bead aligner wheels inboard of said contacting means; means for creating an annular gap between a terminal edge of each bladder peripheral marginal portion, an outboard portion of each said bladder peripheral marginal portion, and the associated bead aligner wheel, said annular gap creating means being defined by an annular axially projecting bead carried by each outboard portion of each said bladder peripheral marginal portions in sealing contact with its associated head aligner wheel, and each annular bead being positioned between said contacting means and said terminal edge.
Claim 2
Dependent Claim
178 words
A retreading mold comprising a pair of relatively movable platens, matrix means carried by each platen for receiving therein a tire to be retreaded, a bead aligner wheel associated with each platen, said bead aligner wheels being in axially opposed relationship to each other, each bead aligner wheel having means at a periphery for contacting a wheel bead and aligning a tire relative thereto, an annular bladder disposed between said platens, said annular bladder having innermost peripheral marginal portions, said innermost peripheral marginal portions being in overlying relationship upon said bead aligner wheels inboard of said contacting means; means for creating an annular gap between a terminal edge of each bladder peripheral marginal portion, an outboard portion of each said bladder peripheral marginal portion, and the associated bead aligner wheel, said annular gap creating means being defined by an annular axially projecting bead carried by each outboard portion of each said bladder peripheral marginal portions in sealing contact with its associated head aligner wheel, and each annular bead being positioned between said contacting means and said terminal edge.
Claim 3
Dependent Claim
49 words
The retreading mold as defined in claim 1 wherein said annular gap creating means is further defined by an annular axially projecting bead carried by each terminal edge in sealing contact with its associated bead aligner wheel inboard of the annular sealing contact created by said first-mentioned annular bead.
Claim 4
Dependent Claim
35 words
The retreading mold as defined in claim 1 wherein each said bead aligner wheels includes a surface upon which an associated marginal portion of said bladder overlies, and each said surface is smooth and uninterrupted.
Claim 5
Dependent Claim
32 words
The retreading mold as defined in claim 2 wherein each said bead aligner wheels includes a surface upon which an associated marginal portion overlies, and each said surface is smooth and uninterrupted.
Claim 6
Dependent Claim
21 words
The retreading mold as defined in claim 1 including means for clamping beads of the tire to said bead aligner wheel.
Claim 7
Dependent Claim
28 words
The retreading mold as defined in claim 1 including means for inflating the interior of said bladder to create a partial vacuum within each of said annular gaps.
References Cited (Backward Citations)
US2695424A
Cited
US2835921A
Cited
US2791805A
Cited
US3170195A
Cited
US3701615A
Cited
US3676028A
Cited
US3989429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |