US3852095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for applying wax to can lid rims
Assignee: Nordson Corp
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Filing: 1970-09-28
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Granted: 1974-12-03
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Expires: 1990-09-28
Abstract
Abstract A method and apparatus for applying a film of wax to the rim of a can end before that end is assembled onto the body of a can. The wax is applied by melting a 100 percent solids wax and forcing it as a liquid without the addition of a solvent through an airless spray nozzle under conditions which result in a thin film of 100 percent solids wax being applied as a narrow annular ring around the rim of the can end.
Inventors
- 👤 E Hogstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:40
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/02; B05B; B05B13/00; B05B13/02; B05B13/0221; B05B13/0242; B05D1/002; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/44; B21D51/46; B05D2202/00; B05D2501/00; B05D2501/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
THE METHOD OF APPLYING A 100 PERCENT SOLIDS PROTECTIVE LAYER OF WAX IN THE CONFIGURATIONN OF AN ANNULAR RING TO THE RIM OF A CAN END WITHOUT THE ADDITION OF ANY SOLVENT SO THAT THE END NEED NOT BE BAKED TO DRIVE OFF SOLVENT FROM THE WAX, WHICH METHOD COMPRISES: ROTATING THE END RELATIVE TO THE ORIFICE OF A NOZZLE OF A SPRAY GUN, MELTING A 100 PERCENT SOLIDS WAX AND SUPPLYING IT IN THE AS MELTED CONDITION TO THE NOZZLE OF SAID SPRAY GUN WITHOUT THE ADDITION OF ANY SOLVENT,
Claim 2
Independent Claim
91 words
THE METHOD OF APPLYING A 100 PERCENT SOLIDS PROTECTIVE LAYER OF WAX IN THE CONFIGURATIONN OF AN ANNULAR RING TO THE RIM OF A CAN END WITHOUT THE ADDITION OF ANY SOLVENT SO THAT THE END NEED NOT BE BAKED TO DRIVE OFF SOLVENT FROM THE WAX, WHICH METHOD COMPRISES: ROTATING THE END RELATIVE TO THE ORIFICE OF A NOZZLE OF A SPRAY GUN, MELTING A 100 PERCENT SOLIDS WAX AND SUPPLYING IT IN THE AS MELTED CONDITION TO THE NOZZLE OF SAID SPRAY GUN WITHOUT THE ADDITION OF ANY SOLVENT,
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein said rim of said end to which said film of wax is applied is located less than onE-half inch from said nozzle orifice.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein said wax is heated to a temperature of approximately 350*F. before it is supplied to the nozzle of said spray gun.
Claim 5
Dependent Claim
30 words
The method of claim 1 wherein said wax is supplied to said nozzle of said spray gun at a pressure in excess of 25 psi but less than 250 psi.
Claim 6
Dependent Claim
24 words
The method of claim 1 wherein said wax is supplied to said nozzle of said spray gun at a pressure of approximately 50 psi.
Claim 7
Dependent Claim
41 words
The method of claim 1 wherein said wax is ejected from a spray nozzle which has a flow rate of less than 0.040 gallons per minute water at 500 psi but more than 0.0075 gallons per minute water at 500 psi.
Claim 8
Dependent Claim
29 words
The method of claim 1 wherein said wax is ejected from a spray nozzle which has a flow rate of approximately 0.015 gallons per minute water at 500 psi.
Claim 9
Dependent Claim
28 words
The method of claim 2 wherein said wax is heated to a temperature of approximately 350* F. before it is supplied to the nozzle of said spray gun.
Claim 10
Dependent Claim
24 words
The method of claim 8 wherein said wax is supplied to said nozzle of said spray gun at a pressure of approximately 50 psi.
Claim 11
Dependent Claim
29 words
The method of claim 9 wherein said wax is ejected from a spray nozzle which has a flow rate of approximately 0.015 gallons per minute water at 500 psi.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |