US3841527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt applicator and method
Assignee: Individual
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Filing: 1973-04-25
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Granted: 1974-10-15
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Expires: 1993-04-25
Abstract
Abstract A hot melt applicator heats and maintains a joint sealing material within a precise temperature range by first flowing the material through coils located in a heat exchange bath where the material is brought to the intended temperature and viscosity. The coils convey the material to a storage tank maintained at this precise temperature range wherein the material resides for a period of time sufficient to remove certain entrapped gases such as air. Thereafter the material is dispensed to its intended area of use. The dispensing means may comprise a hose arrangement maintained within the prescribed temperature range by heat exchange coils which use as its heat exchange medium, fluid from the heat exchange bath.
Inventors
- 👤 Roeschlaub W Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:41
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/06; E01C23/09; E01C23/0966; E01C23/0973
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
185 words
An apparatus for heating and dispensing a sealing material comprising: a heating tank, a material storage tank, and a heat exchange tube bank located within said heating tank, said tube bank being connected at one end to a source of sealing material and at the other end to the storage tank, said heating tank being capable of retaining a heat exchange fluid in heat exchange contact with said tube bank, and said storage tank being open to the atmosphere and of a size sufficient to provide a residence time of said sealing material in said storage tank; means for heating said heat exchange fluid; means for dispensing said sealing material tO an area of use; pump means for moving said sealing material from said source of supply through said tube bank in said heating tank into said storage tank and from said storage tank to and through said dispensing means; and means for maintaining said sealing material within a prescribed, predetermined temperature range when the material resides in said tube bank located in said heating tank and when said material resides in said storage tank.
Claim 2
Independent Claim
185 words
An apparatus for heating and dispensing a sealing material comprising: a heating tank, a material storage tank, and a heat exchange tube bank located within said heating tank, said tube bank being connected at one end to a source of sealing material and at the other end to the storage tank, said heating tank being capable of retaining a heat exchange fluid in heat exchange contact with said tube bank, and said storage tank being open to the atmosphere and of a size sufficient to provide a residence time of said sealing material in said storage tank; means for heating said heat exchange fluid; means for dispensing said sealing material tO an area of use; pump means for moving said sealing material from said source of supply through said tube bank in said heating tank into said storage tank and from said storage tank to and through said dispensing means; and means for maintaining said sealing material within a prescribed, predetermined temperature range when the material resides in said tube bank located in said heating tank and when said material resides in said storage tank.
Claim 3
Dependent Claim
83 words
An apparatus according to claim 1 wherein said apparatus is capable of dispensing a sealing material at its sealing viscosity, which material must be heated within a precise temperature range to achieve such a sealing viscosity and held within said storage tank for a period of time sufficient to allow entrapped gases to escape therefrom, and wherein said means for maintaining said sealing material with said predetermined temperature range includes means for maintaining said heat exchange fluid within a substantially constant temperature range.
Claim 4
Dependent Claim
38 words
An apparatus according to claim 1 wherein said means for maintaining said sealing material within a predetermined temperature range includes means for maintaining said sealing material within the temperature range when the material resides in said dispensing means.
Claim 5
Dependent Claim
35 words
An apparatus according to claim 3 wherein said maintenance means further includes means for delivering said fluid into heat exchange relationship with said dispensing means, and said tube bank includes a bank of tube coils.
Claim 6
Dependent Claim
18 words
An apparatus according to claim 1 which further includes means for recirculating said fluid in the heating tank.
Claim 7
Dependent Claim
18 words
An apparatus according to claim 1 wherein said storage tank is in heat exchange relationship with said fluid.
Claim 8
Dependent Claim
16 words
An apparatus according to claim 6 wherein said storage tank is located within said heating tank.
Claim 9
Dependent Claim
45 words
An apparatus according to claim 6 wherein said storage tank is located outside of said heating, and which further includes means for delivering said fluid from said heating tank into heat exchange relationship with said storage tank and returning said fluid to said heating tank.
Claim 10
Dependent Claim
77 words
An apparatus according to claim 6 wherein said heating means includes a burner means for heating said fluid to within a prescribed temperature range and said maintenance means includes thermostatically responsive burner control means for sensing the temperature of said fluid in said heating tank and controlling the heat output of said burner means in response thereto thereby maintaining said fluid within its prescribed temperature range and thereby maintaining said sealing material within its predetermined temperature range.
Claim 11
Dependent Claim
29 words
An apparatus according to claim 9 which further includes means for recycling at least a portion of said material from said dispensing means at least to said storage tank.
Claim 12
Dependent Claim
32 words
An apparatus according to claim 9 wherein said pump means includes a pump for delivering raw material to said tube bank and a pump for dispensing said material from said storage tank.
Claim 13
Dependent Claim
34 words
An apparatus according to claim 11 wherein said dispensing pump is a two way pump capable of dispensing material through said dispensing means and withdrawing material therefrom and returning it to said storage tank.
Claim 14
Dependent Claim
38 words
An apparatus according to claim 4 wherein said dispensing means includes an elongated hollow tube, and said means for delivering fluid into heat exchange relationship therewith includes heat exchange coils extending about the outer periphery of said tube.
Claim 15
Dependent Claim
103 words
An apparatus according to claim 2 wherein said material consists essentially of a single component liquid hot pour composition comprising about 2-25 percent vinyl chloride resin, and a liquid coal-tar pitch component consisting essentially of a pitch fraction having a boiling point of between about 355* C. and about 450* C., said material being at its sealing viscosity between about 200*-350* F. and being apparatus clogging if not between about 200*-350* F., said maintenance means being capable of maintaining said material within this temperature range, whereby said apparatus is capable of dispensing said material at its proper sealing viscosity without clogging the apparatus.
Claim 16
Dependent Claim
20 words
An apparatus according to claim 14 wherein said maintenance means is capable of maintaining said material between about 290*-300* F.
Claim 17
Independent Claim
165 words
A method of heating and dispensing a sealing material which must be applied as a sealant at a temperature within a prescribed, predetermined temperature range, said material initially containing entrapped gases at least a portion of which must be eliminated, the method comprising, conveying said material through a tube bank in heat exchange relationship with a heat exchange fluid, heating said heat exchange fluid and maintaining said fluid within a substantially constant temperature range thereby to heat and maintain said material while in said tube bank within said predetermined temperature range, thereafter conveying the heated material to a storage zone open to the atmosphere and allowing said material to reside in said zone for a period to time sufficient to remove at least a portion of said entrapped gases while at the same time maintaining said material in said storage zone at a temperature within said predetermined temperature range and thereafter dispensing said material as a sealant at a temperature within said predetermined temperature range.
Claim 18
Independent Claim
165 words
A method of heating and dispensing a sealing material which must be applied as a sealant at a temperature within a prescribed, predetermined temperature range, said material initially containing entrapped gases at least a portion of which must be eliminated, the method comprising, conveying said material through a tube bank in heat exchange relationship with a heat exchange fluid, heating said heat exchange fluid and maintaining said fluid within a substantially constant temperature range thereby to heat and maintain said material while in said tube bank within said predetermined temperature range, thereafter conveying the heated material to a storage zone open to the atmosphere and allowing said material to reside in said zone for a period to time sufficient to remove at least a portion of said entrapped gases while at the same time maintaining said material in said storage zone at a temperature within said predetermined temperature range and thereafter dispensing said material as a sealant at a temperature within said predetermined temperature range.
Claim 19
Dependent Claim
60 words
A method according to claim 16 wherein said material consists essentially of a single component liquid hot pour composition comprising about 2-25 percent vinyl chloride resin, and a liquid coal-tar pitch component consisting essentially of a pitch fraction having a boiling point of between about 355* C. and about 450* C., and said predetermined temperature range is about 200*-350* F.
Claim 20
Dependent Claim
15 words
A method according to claim 17 wherein said predetermined temperature range is about 290*-300* F.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |