US3662927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-melt adhesive systems
Assignee: Individual
•
Filing: 1970-01-21
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Granted: 1972-05-16
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Expires: 1990-01-21
Abstract
Abstract An apparatus for applying hot-melt adhesives comprises a heated tank which supplies fluid adhesive by gravity to an air-operated pump for distribution to a hand-held dispensing gun. The gun and pump are energized simultaneously or in such predetermined fashion as to facilitate accurate dispensing of the adhesive.
Inventors
- 👤 Eric H Cocks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
B; B05; B05C; B05C17/00; B05C17/002; B05C17/005; B05C17/00523
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
259 words
A hot-melt adhesive system comprising tank means for storing hot-melt adhesive material, heater means for melting the adhesive material in said tank and maintaining the material in melted form, pump means mounted on said tank means, first and second cavity means within said pump for receiving melted adhesive, cylindrical plunger means mounted within said pump for reciprocating movement, a first piston portion on one end of said plunger means and located within said first cavity means, a second piston portion on the other end of said plunger means to fit within said second cavity means and force adhesive material therefrom, the reciprocating movement of said cylindrical plunger means being such that said second piston portion reciprocates from a first position within said first cavity means to a second position within said second cavity means. bias means in said pump for biasing said plunger toward said first piston portion, a passageway connecting said tank means to said second cavity means to allow the free flow of adhesive material in both directions, an air pressure source, means connecting said air pressure source to said pump, pump valve means mounted on said pump for controlling the air pressure on said first piston portion of said plunger, and dispensing gun means connected to said cavity means within said pump, said dispensing gun means comprising a fluid passageway within said gun, a valve plunger within said fluid passageway to control the flow of adhesive, dispensing orifice means, solenoid means for controlling the operation of said valve plunger to open and close said orifice means.
Claim 2
Dependent Claim
259 words
A hot-melt adhesive system comprising tank means for storing hot-melt adhesive material, heater means for melting the adhesive material in said tank and maintaining the material in melted form, pump means mounted on said tank means, first and second cavity means within said pump for receiving melted adhesive, cylindrical plunger means mounted within said pump for reciprocating movement, a first piston portion on one end of said plunger means and located within said first cavity means, a second piston portion on the other end of said plunger means to fit within said second cavity means and force adhesive material therefrom, the reciprocating movement of said cylindrical plunger means being such that said second piston portion reciprocates from a first position within said first cavity means to a second position within said second cavity means. bias means in said pump for biasing said plunger toward said first piston portion, a passageway connecting said tank means to said second cavity means to allow the free flow of adhesive material in both directions, an air pressure source, means connecting said air pressure source to said pump, pump valve means mounted on said pump for controlling the air pressure on said first piston portion of said plunger, and dispensing gun means connected to said cavity means within said pump, said dispensing gun means comprising a fluid passageway within said gun, a valve plunger within said fluid passageway to control the flow of adhesive, dispensing orifice means, solenoid means for controlling the operation of said valve plunger to open and close said orifice means.
Claim 3
Dependent Claim
37 words
The combination according to claim 1 wherein said second cavity means is located near a lower portion of said tank means to permit gravity flow of the melted adhesive material from the tank to the second cavity.
Claim 4
Dependent Claim
26 words
The combination according to claim 2 wherein said first piston portion has a larger area than said second piston portion to produce a multiplication of pressure.
Claim 5
Dependent Claim
23 words
The combination according to claim 3 wherein said dispensing gun includes means to actuate said valve plunger and said pump valve means simultaneously.
Claim 6
Dependent Claim
25 words
The combination according to claim 3 wherein said dispensing gun includes means to actuate said pump valve means first and then actuate said valve plunger.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |