US3585361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supply system for heating and dispensing molten thermoplastic material
Assignee: Nordson Corp
•
Filing: 1969-06-18
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Granted: 1971-06-15
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Expires: 1989-06-18
Abstract
Abstract A system for melting thermoplastic material and supplying the molten material under pressure and at a controlled temperature to one or more applicators. The material is melted in a melting tank and pumped from there through a filter into a manifold for distribution. The pump is a single piston, double acting, sealless pump and is driven by an air motor including appropriate air valves and valve controls. From the manifold the molten material is distributed to one or more heated, insulated hoses, each of which is to be connected at its opposite end to an applicator. The temperature of the material in the melting tank and in each hose is separately thermostatically controlled.
Inventors
- 👤 Samuel R Rosen
- 👤 Alan B Reighard
- 👤 Julius S Drozek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:08
CPC Classifications
B; B29; B29B; B29B13/00; B29B13/02; B29B13/022
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
19 words
The system of claim 1, wherein said overcenter mechanism includes resilient means for snapping said valve means into position.
Claim 2
Independent Claim
158 words
A system for supplying molten thermoplastic material to an applicator comprising a tank for storing thermoplastic material, electrical heating means attached to said tank for maintaining said material at a first predetermined temperature, a pump immersed in said material within said tank for supplying pressure to force said material through said system, said pump having an inlet and an outlet for thermoplastic material, means for driving said pump, hose means for carrying thermoplastic material to said applicator, means for carrying thermoplastic material from said pump outlet to said hose means, an electrical heating element attached to said hose means for supplying heat to said hose means throughout its length, and thermostat means for said hose means including a temperature sensing element disposed in the fluid passageway within said hose means for sensing the temperature of said material within a predetermined length of said hose means to provide a temperature standard for the entire length of said hose means.
Claim 3
Dependent Claim
36 words
The system of claim 3 further comprising means for maintaining said predetermined length of said hose means exposed to ambient temperature conditions whereby it may represent the temperature of the entire length of said hose means.
Claim 4
Dependent Claim
66 words
The system of claim 3 wherein said means for carrying thermoplastic material from said pump outlet to said hose means includes a manifold having an inlet in communication with said pump outlet, and at least one outlet, and a filter disposed within said manifold between said inlet and said outlet, said hose means being coupled to said manifold outlet for carrying thermoplastic material to said applicator.
Claim 5
Dependent Claim
129 words
The system of claim 3 wherein said pump includes a cylinder and a piston that reciprocates within said cylinder, and said means for driving said pump comprises an air motor including a cylinder and an air piston that reciprocates within said cylinder, a connecting rod extending between said air piston and said pump piston, two-position valve means for directing air to said air cylinder to move said air piston in a direction dependent upon the position of said valve means, an overcenter mechanism for positioning said valve means, and means carried by said connecting rod for actuating said overcenter mechanism near the end of each stroke of said air piston, whereby said valve means is repositioned to cause a change in the direction of movement of said air piston.
Claim 6
Dependent Claim
19 words
The system of claim 6 wherein said overcenter mechanism includes resilient means for snapping said valve means into position.
Claim 7
Independent Claim
224 words
A system for supplying molten thermoplastic material to an applicator comprising a tank for storing thermoplastic material, electrical heating means attached to said tank for maintainiNg said material at a first predetermined temperature, a pump immersed in said material within said tank for supplying pressure to force said material through said system, said pump having an inlet and an outlet for thermoplastic material, means for driving said pump, a manifold having an inlet in communication with said pump outlet, and at least one outlet, filter means within said manifold between said inlet and said outlet for filtering said thermoplastic material supplied thereto under pressure, hose means coupled to said manifold outlet for carrying thermoplastic material to said applicator, an electrical heating element attached to said hose means for supplying heat to said hose means throughout its length, thermostat means for said hose means including a temperature sensing element disposed in the fluid passageway within said hose means for sensing the temperature of said material within a predetermined length of said hose means to provide a temperature standard for the entire length of said hose means, and means for maintaining said predetermined length of said hose means for maintaining said predetermined length of said hose means exposed to ambient temperature conditions whereby it may represent the temperature of the entire length of said hose means.
References Cited (Backward Citations)
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Cited
US2452367A
Cited
US2754346A
Cited
US2809772A
Cited
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |