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US4162937A Expired / Lapsed US ⏱️ 0.0 years remaining

Water-removal blade for paper-making machines

Assignee: Individual
•
Filing: 1975-01-13
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Granted: 1979-07-31
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Expires: 1995-01-13
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Abstract

Abstract A water-removal device for paper-making machines comprising a fixed beam; a blade having a leading edge; an upper bendable surface positioned behind said blade, and means for adjusting the bend in said bendable surface is described. By adjusting the curvature of the bendable surface, a series of vacuum curves can be obtained, thereby facilitating water-removal.

Inventors

  • 👤 Glauco Corbellini

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 11:55
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/36; D21F1/38; D21F1/48; D21F1/483; D21F1/486

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 176 words
A water-removal device for paper-making machines comprising support means, a blade element having a leading edge made of hard wear-resistant material, means for anchoring said blade element to said support means, an upper bendable surface positioned behind said blade element, and bending means constructed and arranged with said upper bendable surface for bending said bendable surface to create a venturi effect, said bending means including activating and positioning means and being constructed and arranged to provide continuous adjustment to the bending of said bendable surface during the operation of said paper-making machine and wherein said bending means includes a plane surface having a front anchorage means at one end thereof, and a connecting section at the other end thereof; and in reciprocal coordination a drive shaft positioned below and transversely to said upper bendable surface and said activating and positioning means being a lever attached to said drive shaft; a plurality of cams cooperating with a connecting rod in a swinging manner to a fork solidly fixed to the connecting section of said upper bendable surface.
Claim 2
Dependent Claim 176 words
A water-removal device for paper-making machines comprising support means, a blade element having a leading edge made of hard wear-resistant material, means for anchoring said blade element to said support means, an upper bendable surface positioned behind said blade element, and bending means constructed and arranged with said upper bendable surface for bending said bendable surface to create a venturi effect, said bending means including activating and positioning means and being constructed and arranged to provide continuous adjustment to the bending of said bendable surface during the operation of said paper-making machine and wherein said bending means includes a plane surface having a front anchorage means at one end thereof, and a connecting section at the other end thereof; and in reciprocal coordination a drive shaft positioned below and transversely to said upper bendable surface and said activating and positioning means being a lever attached to said drive shaft; a plurality of cams cooperating with a connecting rod in a swinging manner to a fork solidly fixed to the connecting section of said upper bendable surface.
Claim 3
Dependent Claim 143 words
A water-removal device for paper-making machines comprising support means, a blade element having a leading edge made of hard wear-resistant material, means for anchoring said blade element to said support means, an upper bendable surface positioned behind said blade element, and bending means constructed and arranged with said upper bendable surface for bending said bendable surface to create a venturi effect, said bending means including activating and positioning means and being constructed and arranged to provide continuous adjustment to the bending of said bendable surface during the operation of said paper-making machine and wherein said bending means includes in reciprocal coordination a drive shaft with said positioning and activating means being a lever attached to said drive shaft; and a plurality of cams cooperating with the two continuous opposed faces of a C-shaped element positioned below and in cooperation with said bendable surface.
Claim 4
Dependent Claim 143 words
A water-removal device for paper-making machines comprising support means, a blade element having a leading edge made of hard wear-resistant material, means for anchoring said blade element to said support means, an upper bendable surface positioned behind said blade element, and bending means constructed and arranged with said upper bendable surface for bending said bendable surface to create a venturi effect, said bending means including activating and positioning means and being constructed and arranged to provide continuous adjustment to the bending of said bendable surface during the operation of said paper-making machine and wherein said bending means includes in reciprocal coordination a drive shaft with said positioning and activating means being a lever attached to said drive shaft; and a plurality of cams cooperating with the two continuous opposed faces of a C-shaped element positioned below and in cooperation with said bendable surface.

References Cited (Backward Citations)

US2694345A Cited
US3027940A Cited
US2928465A Cited
US3140225A Cited
US3497420A Cited
US3778342A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-07-30 1983-01-29 1983-07-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-07-30 1987-01-29 1987-07-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-07-30 1991-01-29 1991-07-31 $7700.00 Window Closed / Lapsed

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