US3706516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
An apparatus for producing foam sections from components that react quickly with one another when mixed
Assignee: Hennecke GmbH
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Filing: 1969-05-16
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Granted: 1972-12-19
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Expires: 1989-05-16
Abstract
Abstract In the production of foamed articles wherein the foam producing reaction occurs between the belts of a double belt conveyor and the double belt conveyor serves as a mold, the pressure of the foaming reaction of the belts is sensed and, to obtain a uniform structure in the product, the feed rate of the components reacting to from the foam, per unit area of the belt, is correspondingly varied.
Inventors
- 👤 Heinz Kisteneich
- 👤 Ferdinand Proksa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/30; B29C44/304; B29C44/34; B29C44/60; B29L; B29L2007/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
201 words
In an apparatus for making foam articles comprising: a. a double belt conveyor with a lower belt and an upper belt, and a drive means therefor, b. feeding means for feeding a composition to form the foam to the double belt conveyor, the improvement which comprises; c. said upper and lower belts being interconnected by first and second elastic telescopic guides disposed respectively at spaced locations along the length of the belt and responsive to pressure of the foaming reaction imposed on the belts, d. pressure measuring means operatively connected to each of the elastic telescopic guides including averaging means for measuring the foaming pressure, e. comparing means for comparing the foaming pressure sensed by the pressure measuring means with a selected foaming pressure to be maintained between the conveyor belts, f. servomotor means responsive to the difference in said pressures sensed by the comparing means, g. feed control means for varying the feed rate of said composition per unit area of said lower belt, h. said servomotor means being effective to actuate the feed control means to compensate for said pressure difference, for increasing said feed rate when the pressure decreases and decreasing the feed rate when said pressure increases.
Claim 2
Dependent Claim
201 words
In an apparatus for making foam articles comprising: a. a double belt conveyor with a lower belt and an upper belt, and a drive means therefor, b. feeding means for feeding a composition to form the foam to the double belt conveyor, the improvement which comprises; c. said upper and lower belts being interconnected by first and second elastic telescopic guides disposed respectively at spaced locations along the length of the belt and responsive to pressure of the foaming reaction imposed on the belts, d. pressure measuring means operatively connected to each of the elastic telescopic guides including averaging means for measuring the foaming pressure, e. comparing means for comparing the foaming pressure sensed by the pressure measuring means with a selected foaming pressure to be maintained between the conveyor belts, f. servomotor means responsive to the difference in said pressures sensed by the comparing means, g. feed control means for varying the feed rate of said composition per unit area of said lower belt, h. said servomotor means being effective to actuate the feed control means to compensate for said pressure difference, for increasing said feed rate when the pressure decreases and decreasing the feed rate when said pressure increases.
Claim 3
Dependent Claim
27 words
Apparatus according to claim 1, said feed control means comprising a variable speed drive for the conveyor drive means for varying the speed of the conveyor belts.
Claim 4
Dependent Claim
27 words
Apparatus according to claim 1, said feed control means comprising means for controlling said feeding means to vary the feed rate of said composition per unit time.
Claim 5
Dependent Claim
36 words
Apparatus according to claim 3, said feeding means comprising a pump for pumping to the double belt conveyor composition for said foam, said feed control means comprising means for controlling the pumping rate of said pump.
Claim 6
Dependent Claim
50 words
Apparatus according to claim 3, said feeding means comprising a pump for pumping to the double belt conveyor composition for said foam, and a pipe for delivery of the discharge of the pump to the double belt conveyor, said feed control means comprising means for throttling flow through said pipe.
Claim 7
Dependent Claim
140 words
A foaming machine for production of foam articles, comprising a driven double conveyor belt with a lower belt and an upper belt and an applicator for composition to form the foam, wherein the upper belt and lower belt of the double belt conveyor are interconnected by first and second elastic telescopic guides disposed respectively at spaced locations along the length of the belt and responsive to pressure of the foaming reaction on the belts, the double belt conveyor is outfitted with a pressure measuring means operatively connected to each of the elastic telescopic guides including averaging means for measuring the foaming pressure, said pressure measuring means is coupled with the driving motor of the double conveyor belt through a regulator and a servomotor for influencing the feed rate per unit area by varying the rate of travel of the belts.
Claim 8
Dependent Claim
140 words
A foaming machine for production of foam articles, comprising a driven double conveyor belt with a lower belt and an upper belt and an applicator for composition to form the foam, wherein the upper belt and lower belt of the double belt conveyor are interconnected by first and second elastic telescopic guides disposed respectively at spaced locations along the length of the belt and responsive to pressure of the foaming reaction on the belts, the double belt conveyor is outfitted with a pressure measuring means operatively connected to each of the elastic telescopic guides including averaging means for measuring the foaming pressure, said pressure measuring means is coupled with the driving motor of the double conveyor belt through a regulator and a servomotor for influencing the feed rate per unit area by varying the rate of travel of the belts.
Claim 9
Dependent Claim
135 words
A foaming machine for production of foam articles comprising a driven double conveyor belt with an upper and lower belt and an applicator equipped with a feed pump for the composition to form the foam wherein the upper belt and lower belt of the double belt conveyor are interconnected by first and second elastic telescopic guides disposed respectively at spaced locations along the length of the belt and responsive to pressure of the foaming reaction on the belts, the double belt conveyor is outfitted with pressure measuring means operatively connected to each of the elastic telescopic guides including averaging means for measuring the foaming pressure, and the pressure measuring means is coupled with the feed pump through A regulator and a servomotor for influencing the feed rate per unit area by varying the pumping rate.
Claim 10
Dependent Claim
135 words
A foaming machine for production of foam articles comprising a driven double conveyor belt with an upper and lower belt and an applicator equipped with a feed pump for the composition to form the foam wherein the upper belt and lower belt of the double belt conveyor are interconnected by first and second elastic telescopic guides disposed respectively at spaced locations along the length of the belt and responsive to pressure of the foaming reaction on the belts, the double belt conveyor is outfitted with pressure measuring means operatively connected to each of the elastic telescopic guides including averaging means for measuring the foaming pressure, and the pressure measuring means is coupled with the feed pump through A regulator and a servomotor for influencing the feed rate per unit area by varying the pumping rate.
Claim 11
Dependent Claim
154 words
A foaming machine for production of foam articles comprising a driven double conveyor belt with an upper and a lower belt and an applicator equipped with a feed pump for the composition to form the foam, adjustable throttle means being arranged in the feed lines between the feed pump and the applicator, wherein the upper and lower belt of the double belt conveyor are interconnected by first and second elastic telescopic guides disposed respectively at spaced locations along the length of the belt and responsive to pressure of the foaming reaction on the belts, the double belt conveyor is outfitted with pressure measuring means operatively connected to each of the elastic telescopic guides including averaging means for measuring the foaming pressure, and the pressure measuring means is coupled with the throttle means through a regulator and a servomotor for influencing the feed rate per unit area by varying the feed rate to the applicator.
Claim 12
Dependent Claim
154 words
A foaming machine for production of foam articles comprising a driven double conveyor belt with an upper and a lower belt and an applicator equipped with a feed pump for the composition to form the foam, adjustable throttle means being arranged in the feed lines between the feed pump and the applicator, wherein the upper and lower belt of the double belt conveyor are interconnected by first and second elastic telescopic guides disposed respectively at spaced locations along the length of the belt and responsive to pressure of the foaming reaction on the belts, the double belt conveyor is outfitted with pressure measuring means operatively connected to each of the elastic telescopic guides including averaging means for measuring the foaming pressure, and the pressure measuring means is coupled with the throttle means through a regulator and a servomotor for influencing the feed rate per unit area by varying the feed rate to the applicator.
Claim 13
Dependent Claim
178 words
In apparatus for making foam articles comprising: a. a double belt conveyor with a lower belt and an upper belt, and a drive means therefor, b. feeding means for feeding a composition to form the foam to the double belt conveyor, the improvement which comprises: c. first and second pressure measuring means disposed respectively at spaced intervals along the length of the belt and averaging means for measuring the foaming pressure during production of the foam between the upper and lower belts, d. comparing means for comparing the foaming pressure sensed by the pressure measuring means with a selected foaming pressure to be maintained between the conveyor belts, e. servomotor means responsive to the difference in said pressures sensed by the comparing means, f. feed control means for varying the feed rate of said composition per unit area of said lower belt, g. said servomotor means being effective to actuate the feed control means to compensate for said pressure difference, for increasing said feed rate when the pressure decreases and decreasing the feed rate when said pressure increases.
Claim 14
Dependent Claim
178 words
In apparatus for making foam articles comprising: a. a double belt conveyor with a lower belt and an upper belt, and a drive means therefor, b. feeding means for feeding a composition to form the foam to the double belt conveyor, the improvement which comprises: c. first and second pressure measuring means disposed respectively at spaced intervals along the length of the belt and averaging means for measuring the foaming pressure during production of the foam between the upper and lower belts, d. comparing means for comparing the foaming pressure sensed by the pressure measuring means with a selected foaming pressure to be maintained between the conveyor belts, e. servomotor means responsive to the difference in said pressures sensed by the comparing means, f. feed control means for varying the feed rate of said composition per unit area of said lower belt, g. said servomotor means being effective to actuate the feed control means to compensate for said pressure difference, for increasing said feed rate when the pressure decreases and decreasing the feed rate when said pressure increases.
References Cited (Backward Citations)
US2786234A
Cited
US3274643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |