US3767503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing method
Assignee: Cities Service Co
•
Filing: 1971-07-23
•
Granted: 1973-10-23
•
Expires: 1991-07-23
Abstract
Abstract Elastomeric sealant compositions are heated and extruded as a tape. The extruded tape is applied hot to a structural joint to be sealed. Application is thus much easier than with a cold tape and bonding to substrates is greatly enhanced. Furthermore, tape which would otherwise be too stiff can be installed in this manner while providing outstanding yield strength and resistance to creep. In preferred embodiments of the invention, the tape is extruded continuously and is simultaneously applied to one or more surfaces being joined. The invention can be used to advantage in the installation of automobile windshields and in the sealing of joints in architectural structures or roadways.
Inventors
- 👤 J Maddalena
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:12
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/48; B29C65/4865
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
26 words
The process of claim 1 wherein the Compression Value of the applied, heated tape is within the range of about 80 p.c.i. to about 120 p.c.i.
Claim 2
Dependent Claim
21 words
The process of claim 1 wherein the Compression Value of the tape at 75* F. is in excess of 200 p.c.i.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the tape is applied to a joint between an automobile body and a window glass of an automobile.
Claim 4
Dependent Claim
22 words
The method of claim 4 wherein the Compression Value of said sealant composition at 75* F. is in excess of 200 p.c.i.
Claim 5
Dependent Claim
21 words
The method of claim 4 wherein the tape is continuously extruded and is simultaneously applied to a joint to be sealed.
Claim 6
Dependent Claim
111 words
The method of claim 4 wherein: a. the elastomeric composition is extruded as a heated tape having a shape adapted to seal a joint existing between first and second structural members when edges of said members are placed adjacent to each other, b. applying the resulting heated tape on an edge of said first member, c. placing an edge of said second member in firm contact with the heated tape applied to the edge of said first member, thus establishing a sealing relationship between adjacent edges of the two members through contact with said tape, and d. allowing said tape to cool after hot application to adjacent edges of both members.
Claim 7
Dependent Claim
23 words
The method of claim 7 wherein the tape is continuously extruded and is simultaneously applied to an edge of said first structural member.
Claim 8
Dependent Claim
160 words
A process for sealing a structural joint with an elastomeric sealant composition which comprises: a. mixing a rubber, a filler and a plasticizer and forming a compounded elastomeric sealant composition thereof, the composition being undesirably stiff for application to and bonding with substrates of the joint at ambient temperatures, the stiffness of the composition at 75* F. being characterized by a Compression Value within the range of about 150 p.c.i. to about 500 p.c.i., b. extruding the compositioN in the form of a heated tape having a desired stiffness which is lower than measured at 75* F., c. applying the heated, extruded tape to the structural joint to be sealed, the stiffness of the applied heated tape being characterized by a Compression Value within the range of about 40 p.c.i. to about 175 p.c.i., d. sealing the structural joint with the applied tape while thus heated, and e. allowing the tape to cool after sealing of the structural joint therewith.
Claim 9
Dependent Claim
26 words
The process of claim 9 wherein the Compression Value of the applied, heated tape is within the range of about 80 p.c.i. to about 120 p.c.i.
Claim 10
Dependent Claim
24 words
The process as in claim 10 wherein the sealant compound further comprises about 10 to about 60 parts by weight of a tackifying agent.
Claim 11
Dependent Claim
22 words
The method of claim 10 wherein the butyl rubber in said composition is partially vulcanized when extruded and applied to said joint.
Claim 12
Dependent Claim
41 words
The process as in claim 10 wherein the sealant composition comprises 100 parts by weight of butyl rubber, about 70 to about 150 parts by weight of carbon black, and about 50 to about 130 parts by weight of plasticizer oil.
Claim 13
Dependent Claim
40 words
The process of claim 9 wherein the sealant compound comprises 100 parts by weight of butyl rubber, about 50 to about 250 parts by weight of plasticizer oil, and about 70 to about 500 parts by weight of a filler.
References Cited (Backward Citations)
US3155204A
Cited
US3241277A
Cited
US3340224A
Cited
US3490978A
Cited
US3444023A
Cited
US3468738A
Cited
US3542619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |