US3764767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction embossing
Assignee: Individual
•
Filing: 1971-12-16
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Granted: 1973-10-09
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Expires: 1991-12-16
Abstract
Abstract Method and apparatus for embossing wood or the like with threedimensional designs in which a rotary mounted embossing wheel is heated to a high temperature by induced currents. The heated wheel bears on stock driven past the wheel to emboss the stock by heat and pressure.
Inventors
- 👤 A Randolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:35
CPC Classifications
B; B44; B44B; B44B5/00; B44B5/02; B44B5/028; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/32; B29C66/00; B29C66/01; B29C66/05; B29C66/20; B29C66/21; B29C66/22; B29C66/221; B29C66/80; B29C66/81; B29C66/812; B29C66/8126; B29C66/814; B29C66/8141; B29C66/81433; B29C66/818; B29C66/8181; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29C66/83417; B29C66/8182; B29C66/81821; B29C66/8187; B29C66/81871; B29C66/87; B29C66/876; B29K; B29K2995/00; B29K2995/0003; B29K2995/0008
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
A method of embossing wood stock and the like with a rotary mounted wheel having an electrically conducting embossing rim about the periphery thereof comprising the steps of disposing a magnetic yoke with poles thereof on opposite sides of said wheel in close proximity thereto radially between the wheel mounting and wheel rim, coupling an electricaL winding to said yoke, energizing said electrical winding with an alternating current voltage to thus induce a current about the complete circumference of the rim of said wheel for heating the wheel rim, controllably varying the amplitude of said energizing alternating current to control the temperature of said embossing wheel rim, and moving stock tangentially past the embossing wheel in bearing relation thereto for embossing the stock.
Claim 2
Independent Claim
123 words
A method of embossing wood stock and the like with a rotary mounted wheel having an electrically conducting embossing rim about the periphery thereof comprising the steps of disposing a magnetic yoke with poles thereof on opposite sides of said wheel in close proximity thereto radially between the wheel mounting and wheel rim, coupling an electricaL winding to said yoke, energizing said electrical winding with an alternating current voltage to thus induce a current about the complete circumference of the rim of said wheel for heating the wheel rim, controllably varying the amplitude of said energizing alternating current to control the temperature of said embossing wheel rim, and moving stock tangentially past the embossing wheel in bearing relation thereto for embossing the stock.
Claim 3
Dependent Claim
27 words
The method of claim 1 further defined by insulating the rim of the embossing wheel from the rotary mounting thereof to minimize heat transfer to the mounting.
Claim 4
Dependent Claim
36 words
The method of claim 2 further defined by said insulating being both with regard to the flow of electricity and heat to limit induced current to the wheel rim and peripheral heat to the wheel rim.
Claim 5
Dependent Claim
91 words
Improved embossing apparatus for wood stock or the like comprising an embossing wheel rotatably mounted in position for engagement with wood stock or the like, said embossing wheel having a metal embossing rim comprising a single closed turn winding about said core whereby said induced heating current circulates about said rim, an electrical winding, a magnet core having poles closely spaced from sides of said embossing wheel for coupling said winding and embossing wheel, and means energizing said winding with an alternating current for inducing a heating current in said wheel.
Claim 6
Dependent Claim
91 words
Improved embossing apparatus for wood stock or the like comprising an embossing wheel rotatably mounted in position for engagement with wood stock or the like, said embossing wheel having a metal embossing rim comprising a single closed turn winding about said core whereby said induced heating current circulates about said rim, an electrical winding, a magnet core having poles closely spaced from sides of said embossing wheel for coupling said winding and embossing wheel, and means energizing said winding with an alternating current for inducing a heating current in said wheel.
Claim 7
Dependent Claim
47 words
The apparatus of claim 4 further defined by said embossing wheel including an annular portion formed of a large plurality of ferromagnetic wires extending laterally across the wheel, and said magnet core extending into close proximity with opposite ends of said wires for close magnetic coupling thereto.
Claim 8
Dependent Claim
35 words
The apparatus of claim 5 further defined by said wheel including an annular insulating layer between said wire portion and an embossing rim and an annular heat insulating portion radially inward from said wire portion.
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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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |