Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1976-03-17
1978-01-03
Ansher, Harold
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277DIG6, 428161, 428217, 428392, 428412, 428425, 428515, F16J 1532, B32B 2740, B32B 2712
Patent
active
040662691
ABSTRACT:
The invention is concerned with a unitary seal comprising a support section formed of a high modulus, i.e., rigid high impact strength plastic and a sealing section formed of an elastomeric material, the support and sealing section being directly bonded together without the use of an adhesive therebetween to form the unitary seal. Such a seal may take the form, for example, of a collar of the high modulus rigid plastic with an interior sealing lip of the elastomeric material within the collar and directly bonded thereto. In another sense the invention comprises a process for forming such a unitary seal. The process of the invention comprises contacting a surface portion of the support section directly with a surface portion of the sealing section, under sufficient pressure to assure a pressed contact therebetween, with the sections at a temperature of 50.degree. C - 400.degree. C for a time sufficient to cause bonding between the contacting surface portions to form the unitary seal.
REFERENCES:
patent: 2950266 (1960-08-01), Goldblum
patent: 3069287 (1962-12-01), Hudson
patent: 3413183 (1968-11-01), Findlay et al.
patent: 3413389 (1968-11-01), Footner
patent: 3528669 (1970-09-01), Tondato
patent: 3552755 (1971-01-01), Leonard
patent: 3622427 (1970-04-01), Kelly
patent: 3657057 (1972-04-01), Shorr et al.
patent: 3919448 (1975-11-01), Dufresne
patent: 3995868 (1976-12-01), Smith
Ansher Harold
Caterpillar Tractor Co.
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