US3607523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double facer heat control method and apparatus
Assignee: Harris Corp
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Filing: 1969-07-28
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Granted: 1971-09-21
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Expires: 1989-07-28
Abstract
Abstract A double facer machine for making double-faced corrugated paperboard is provided with an automatic control for ballast rolls. The automatic control is responsive to movement of heated platens. As surface contact between the corrugated paperboard and the platens decreases due to movement of the platens away from the paperboard, ballast rolls are caused to move upwardly away from the paperboard.
Inventors
- 👤 George W Mcgirr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:13
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/26; B31F1/28; B31F1/2845; B31F1/285; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
27 words
A machine in accordance with claim 1 wherein each ballast roll is supported by a pair of links pivotably supported above the lower run of the belt.
Claim 2
Dependent Claim
49 words
A machine in accordance with claim 2 wherein said automatic means includes at least one lever supported to engage a lower end portion of one of said links, and a surface on said one platen for causing movement of said lever to effect upward movement of the ballast roll.
Claim 3
Dependent Claim
26 words
A machine in accordance with claim 1 wherein said heated platens are supported for pivotable movement about an axis adjacent the downstream end of the platens.
Claim 4
Dependent Claim
50 words
A machine in accordance with claim 1 wherein each ballast roll is supported by a pair of links disposed at an acute angle and pivotably supported above said one platen, and means on one of the links for moving the adjacent link in the same direction at the same time.
Claim 5
Dependent Claim
160 words
A double facer machine comprising a plurality of aligned heated platens each having an upper surface for contact with paperboard, an endless belt above said surfaces for moving the paperboard across said surfaces, at least two ballast rolls supported above each of the platens and in contact with the lower run of the belt, said platens being mounted for pivotable movement downwardly away from the plane of the paperboard to decrease heat transfer to the paperboard, and means for automatically moving said ballast rolls upwardly away from contact with the lower run of the belt in response to downward pivotable movement of said platens, said automatic means including lugs on opposite sides of each platen, a separate link pivotably supported by a frame member adjacent each lug, a pivotable link supporting each end of each ballast roll, the links supporting one of the ballast rolls having lower end portions juxtaposed to and aligned with a separate one of said levers.
Claim 6
Independent Claim
135 words
A method of controlling heat transfer to paperboard as the paperboard is processed by a double facer machine comprising the steps of introducing heat into paperboard by causing the paperboard web to contact the upper surfaces of aligned heated platens, moving the paperboard across said surfaces by an endless belt, maintaining the paperboard in intimate contact with said surfaces by means of at least two parallel transversely extending ballast rolls engaging the lower run of the belt, and selectively reducing heat transfer to a substantial extent from said platens to said paperboard by moving selected ones of said platens downwardly away from the paperboard while simultaneously moving the ballast rolls associated with the selected platens upwardly out of contact with the lower run of said belt in response to said downward movement of the platens.
Claim 7
Dependent Claim
50 words
A method in accordance with claim 7 wherein said downward movement of the platens is effected by tilting the platens about an axis adjacent the downstream end of the platens, and said moving of the ballast rolls upwardly including pivoting the ballast rolls about an axis above the ballast rolls.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |