US3779426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive applicator
Assignee: RALPHS C I C Ltd
•
Filing: 1972-05-15
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Granted: 1973-12-18
•
Expires: 1992-05-15
Abstract
Abstract An adhesive applicator for use in the lasting of shoes, the applicator including a reservoir for molten adhesive, an air passage leading to a nozzle through which air under pressure is supplied, a pump for feeding molten adhesive into a moving air stream in the air passage, and means for feeding predetermined quantities of adhesive into the reservoir. In operation the applicator is so controlled that the desired quantity of adhesive is first fed to the reservoir, air under pressure is caused to flow through the air passage and nozzle and the pump is then operated to expel the desired quantity of adhesive into the air passage.
Inventors
- 👤 R Mawby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:16
CPC Classifications
A; A43; A43D; A43D25/00; A43D25/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
157 words
An adhesive applicator comprising a housing formed to provide a reservoir for molten adhesive, an air passage in the housing extending from an inlet for compressed air to an outlet in at least one nozzle mounted on the housing, an adhesive passage in the housing extending from the reservoir to the air passage, a pump mounted on the housing and operable to expel adhesive from the reservoir through the adhesive passage, means for controlling the admission of air to the air passage and for operating the pump such that adhesive is expelled from the reservoir through the adhesive passage into a moving air stream in the air passage, means for charging the reservoir with adhesive, and means in said housing for heating and melting said adhesive, the charging means being operable to determine the quantity of adhesive fed to the reservoir and thus the quantity of adhesive expelled therefrom by the pump and ejected through the nozzle.
Claim 2
Dependent Claim
157 words
An adhesive applicator comprising a housing formed to provide a reservoir for molten adhesive, an air passage in the housing extending from an inlet for compressed air to an outlet in at least one nozzle mounted on the housing, an adhesive passage in the housing extending from the reservoir to the air passage, a pump mounted on the housing and operable to expel adhesive from the reservoir through the adhesive passage, means for controlling the admission of air to the air passage and for operating the pump such that adhesive is expelled from the reservoir through the adhesive passage into a moving air stream in the air passage, means for charging the reservoir with adhesive, and means in said housing for heating and melting said adhesive, the charging means being operable to determine the quantity of adhesive fed to the reservoir and thus the quantity of adhesive expelled therefrom by the pump and ejected through the nozzle.
Claim 3
Dependent Claim
19 words
An adhesive applicator as claimed in any preceding claim 1 in which the adhesive passage includes a non-return valve.
Claim 4
Dependent Claim
30 words
An adhesive applicator as claimed in claim 1 in which the adhesive pump comprises a piston movable in a cylinder formed in the housing and operable by a penumatic cylinder.
Claim 5
Dependent Claim
34 words
An adhesive applicator as claimed in claim 3 including valve means for controlling the supply of compressed air to the pneumatic cylinder and to the inlet to the air passage in the required sequence.
Claim 6
Dependent Claim
38 words
An adhesive applicator as claimed in claim 3 in which the piston is a loose fit in its cylinder to allow for the escape past the piston of gases which are formed during the melting of the adhesive.
Claim 7
Dependent Claim
44 words
An adhesive applicator as claimed in claim 1 in which adhesive is supplied to the applicator in the form of a solid rod which is moved intermittently into a melting passage formed in the housing and from which molten adhesive passes into the reservoir.
Claim 8
Dependent Claim
22 words
An adhesive applicator as claimed in claim 6 in which the melting passage is formed as a helical passage in the housing.
Claim 9
Dependent Claim
48 words
An adhesive applicator as claimed in claim 7 in which the cross-sectional area of an initial portion of the passage is substantially equal to the cross-sectional area of the rod and the cross-sectional area of the subsequent portion of the passage is less than that of the rod.
Claim 10
Dependent Claim
46 words
An adhesive applicator as claimed in claim 6 in which the means for moving the rod intermittently comprises a reciprocable feed device which grips the adhesive rod to be fed to the melting passage and controls the length of rod to be fed at each stroke.
Claim 11
Dependent Claim
79 words
An adhesive applicator as claimed in claim 9 in which the feed device includes two sets of claws for engaging the rod, one set of claws being stop claws which are in fixed position and allow adhesive rod to move between them in a forwards direction but prevent reverse movement, and the other set of claws being feed claws which are movable in a forwards and backwards direction and grip the rod to feed it during their forwards movement.
Claim 12
Dependent Claim
21 words
An adhesive applicator as claimed in claim 9 including adjustable stop means for limiting the forwards movement of the feed claws.
References Cited (Backward Citations)
US2567960A
Cited
US2795761A
Cited
US2821947A
Cited
US2891661A
Cited
US3239103A
Cited
US3585361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |