CA2659019A1 - Patterned tire retreading envelopes - Google Patents
Patterned tire retreading envelopes Download PDFInfo
- Publication number
- CA2659019A1 CA2659019A1 CA 2659019 CA2659019A CA2659019A1 CA 2659019 A1 CA2659019 A1 CA 2659019A1 CA 2659019 CA2659019 CA 2659019 CA 2659019 A CA2659019 A CA 2659019A CA 2659019 A1 CA2659019 A1 CA 2659019A1
- Authority
- CA
- Canada
- Prior art keywords
- envelope
- tire
- retreading
- tire casing
- sidewall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
- B29D30/54—Retreading
- B29D30/542—Retreading using envelopes or membranes provided with sealings for curing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
A method for sealing a tire retreading envelope before vulcanization of a new tread and the bonding rubber materials utilizes a pair of rigid circular rings and a series of clasps on the ring for clasping the ring tightly onto the exterior of the tire casing bead with the envelope in between the bead and the rings. The tire with the new tread and bonding materials is enclosed inside a completely sealed envelope afterward in the vulcanization process of the tire retreading. With each ring clasping tightly onto each side of the bead, envelope is completely touched and pressed against the surface of the new tread and the sidewall of the new tread, bonding materials and the tire casing. As one of the bonding materials, sidewall rubber is made of a blend of anti-fatigue components and performances as camelback shoulder support as well as for the precured tread edge finishing. While the envelope is pressed tightly onto the sidewall of the tire casing as well as the sidewall rubber throughout the vulcanization process, the pattern inside the envelope where locates in the same position as the portion touched the sidewall rubber is branding and carving with the pattern when the envelope is evacuated and the tire goes through the vulcanization process.
Description
Patterned Tire Retreading Envelopes DISCRIPTION OF THE PRIOR ARTS
Commonly, the inside of tire retreading envelope is smooth and no prints/patterns at all. The sidewall rubber is bonding to the sidewall of the tire casing and concealing the new tread edge to the tire casing after coming out from the vulcanization chamber with a smooth surface as well. Even though the sidewall rubber, in a certain degree, can conceal the bonding of the new tread and the tire casing well, the major disadvantage of the previous arts of tire retreading envelopes is the possibility of separation occurring between the lower margin of the sidewall rubber and the tire casing in the later on transportation performances.
This separation might not necessarily create the separation between the tire casing and the new tread, which the problem most of the transportation companies are afraid of so that to avoid using retreaded tires. However, the separation between the lower margin of the sidewall rubber and the tire casing is definitely a serious aesthetic problem to the tire retread products and to a large certain of degree, hitting down the confidence of retreaded tire users and rising up the controversies in the tire retread industry.
BACKGROUND OF THE INVENTION
The invention by creating patterns inside a tire retreading envelope relates generally to an improved aesthetic appearance of the sidewall rubber as well as to the overall aesthetic appearance of finished retreading tire products. After the vulcanization process, the sidewall rubber is branding and carved with the pattern inside the envelope. The most importantly, with the pattern carved into the sidewall rubber, air or other factors are prevented from passing between the sidewall rubber and tire casing both through the vulcanization process and the transportation performances.
The invention successfully uniformly bond the precured sidewall rubber to the tire casing by largely incr-easing-thebonding--strength-betweenthem-and=r the-area-ofthey-are-bonding-more-tightly-together, in order to eliminate the risks that they might separate by air or other factors passing.
BRIEF DISCRIPTION OF THE DRAWING
FIG 1 is an outside view of the Patterned Tire Retreading Envelope FIG 2 is an inside view of the Patterned Tire Retreading welove FIG 3 is a view of the finished retreading tire product by the Patterned Tire Retreading Envelope FIG4 is a view of the finished retreading tire product by the common tire retreading envelope
Commonly, the inside of tire retreading envelope is smooth and no prints/patterns at all. The sidewall rubber is bonding to the sidewall of the tire casing and concealing the new tread edge to the tire casing after coming out from the vulcanization chamber with a smooth surface as well. Even though the sidewall rubber, in a certain degree, can conceal the bonding of the new tread and the tire casing well, the major disadvantage of the previous arts of tire retreading envelopes is the possibility of separation occurring between the lower margin of the sidewall rubber and the tire casing in the later on transportation performances.
This separation might not necessarily create the separation between the tire casing and the new tread, which the problem most of the transportation companies are afraid of so that to avoid using retreaded tires. However, the separation between the lower margin of the sidewall rubber and the tire casing is definitely a serious aesthetic problem to the tire retread products and to a large certain of degree, hitting down the confidence of retreaded tire users and rising up the controversies in the tire retread industry.
BACKGROUND OF THE INVENTION
The invention by creating patterns inside a tire retreading envelope relates generally to an improved aesthetic appearance of the sidewall rubber as well as to the overall aesthetic appearance of finished retreading tire products. After the vulcanization process, the sidewall rubber is branding and carved with the pattern inside the envelope. The most importantly, with the pattern carved into the sidewall rubber, air or other factors are prevented from passing between the sidewall rubber and tire casing both through the vulcanization process and the transportation performances.
The invention successfully uniformly bond the precured sidewall rubber to the tire casing by largely incr-easing-thebonding--strength-betweenthem-and=r the-area-ofthey-are-bonding-more-tightly-together, in order to eliminate the risks that they might separate by air or other factors passing.
BRIEF DISCRIPTION OF THE DRAWING
FIG 1 is an outside view of the Patterned Tire Retreading Envelope FIG 2 is an inside view of the Patterned Tire Retreading welove FIG 3 is a view of the finished retreading tire product by the Patterned Tire Retreading Envelope FIG4 is a view of the finished retreading tire product by the common tire retreading envelope
Claims (4)
1.The apparatus for sealing a retreading envelope comprising:
a pair of rigid circular rings sized to fit against the exterior of the tire casing bead, with the patterned retreading envelope placed between the rings and the tire casing;
with centering the tire casing inside the patterned retreading envelope, the both sidewalls of the envelopes should enclose both sides with similar length;
a series of clasps press tightly and continuous against the envelopes to the exterior of the tire casing bead.
a pair of rigid circular rings sized to fit against the exterior of the tire casing bead, with the patterned retreading envelope placed between the rings and the tire casing;
with centering the tire casing inside the patterned retreading envelope, the both sidewalls of the envelopes should enclose both sides with similar length;
a series of clasps press tightly and continuous against the envelopes to the exterior of the tire casing bead.
2. The rigid circular ring as recited in claim 1 usually has several years of lifespan and must be abandoned if the deformation of shape occurs for the secure of sealing the retreading envelope.
3. The series of clasps as recited in claim 1 are build in the rigid circular ring including a clasp arm movable between an open and a closed position.
4. The patterned retreading envelope as recited in claim 1 has the patterns located inside the tire retreading envelope, the same position as the engaged position to the sidewall rubber, as a result, the pattern is only branded and carved onto the portion of sidewall rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2659019 CA2659019A1 (en) | 2009-03-24 | 2009-03-24 | Patterned tire retreading envelopes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2659019 CA2659019A1 (en) | 2009-03-24 | 2009-03-24 | Patterned tire retreading envelopes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2659019A1 true CA2659019A1 (en) | 2010-09-24 |
Family
ID=42781973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2659019 Abandoned CA2659019A1 (en) | 2009-03-24 | 2009-03-24 | Patterned tire retreading envelopes |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2659019A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018076089A1 (en) * | 2016-10-25 | 2018-05-03 | Takahashi Roberto Kazuhiko | Envelope sealing ring used in an autoclave vulcanization process for tubeless tires |
-
2009
- 2009-03-24 CA CA 2659019 patent/CA2659019A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018076089A1 (en) * | 2016-10-25 | 2018-05-03 | Takahashi Roberto Kazuhiko | Envelope sealing ring used in an autoclave vulcanization process for tubeless tires |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |
Effective date: 20140325 |