EP0033559A2
Expired / Lapsed
EP
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A method of and an apparatus for making imprinted paper
Assignee: Procter and Gamble Co
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Filing: 1981-01-19
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Granted: —
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Expires: 2001-01-19
Abstract
Abstract An improved method of making imprinted paper on a Yankee dryer type papermaking machine wherein a substantial length portion of a loop of imprinting fabric post-wraps an arcuate sector of the Yankee dryer immediately after a pressure roll-Yankee dryer nip, and by being tensioned imposes radially inwardly acting compressive loading on a corresponding length portion of the web disposed between the fabric and the dryer surface. This enables, for instance, improved Yankee dryer speed, improved web tension and edge control of the paper when creped off the Yankee dryer, reduced use of adhesive on the Yankee dryer surface, improved fiber transfer efficiency, and reduced energy consumption per ton of paper made.
Inventors
- 👤 Terrill Alan Young
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 16:05
CPC Classifications
D; D21; D21F; D21F11/00; D21F11/006; D21F11/02; D21F11/04; D21F3/00; D21F3/02; D21F3/0281
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
127 words
A method of continuously forming, forwarding, and drying an endless web of paper which method includes imprinting the web under substantial pressure with the knuckle pattern of an endless loop of imprinting fabric by forwarding the web disposed on the fabric through a pressure biased nip between a pressure roll and a dryer cylinder, and transferring and adhering the web to the cylindrical surface of the dryer cylinder with moisture and pressure responsive creping adhesive applied thereto upstream from the nip, characterised in that it comprises the step of biasing a substantial length portion of said fabric loop towards an arcuate sector of the dryer cylinder disposed immediately adjacent to and extending downstream from said nip with a corresponding length portion of the web compressively loaded therebetween.
Claim 2
Independent Claim
127 words
A method of continuously forming, forwarding, and drying an endless web of paper which method includes imprinting the web under substantial pressure with the knuckle pattern of an endless loop of imprinting fabric by forwarding the web disposed on the fabric through a pressure biased nip between a pressure roll and a dryer cylinder, and transferring and adhering the web to the cylindrical surface of the dryer cylinder with moisture and pressure responsive creping adhesive applied thereto upstream from the nip, characterised in that it comprises the step of biasing a substantial length portion of said fabric loop towards an arcuate sector of the dryer cylinder disposed immediately adjacent to and extending downstream from said nip with a corresponding length portion of the web compressively loaded therebetween.
Claim 3
Dependent Claim
43 words
A method according to Claim 1 characterised in that said length portions are sufficiently long with respect to the peripheral velocity of said dryer cylinder that said web is subjected to said compressible loading for a period of from 0.004 to 0.714 seconds.
Claim 4
Dependent Claim
15 words
A method according to Claim 2 wherein said period is from 0.004 to 0.096 seconds.
Claim 5
Independent Claim
22 words
A method according to any one of Claims 1-3 wherein the web is a stratified web formed of at least two layers.
Claim 6
Independent Claim
150 words
An apparatus for making imprinted paper which apparatus is of the type wherein a web (20,127) is wet formed on a forming means (12, 103) and then forwarded to a dryer cylinder (54,150) on an imprinting carrier fabric loop (30,137) without subjecting the web to substantial compaction prior to reaching the dryer cylinder (54,150)and in which apparatus a pressure roll (38,141) is biased with substantial force towards the dryer cylinder to form a nip therebetween through which the web (20,127) backed by the imprinting carrier fabric (30,137) is forwarded onto the dryer cylinder (54,150) and adhered thereto with moisture and pressure responsive adhesive disposed thereon, characterised in that it comprises means for biasing (70,160) a substantial length portion (176,177) of said imprinting carrier fabric loop (30,137) radially inwardly towards a substantial arcuate sector (α1,α2) of said dryer cylinder immediately adjacent and downstream from said nip with said web disposed therebetween.
Claim 7
Independent Claim
150 words
An apparatus for making imprinted paper which apparatus is of the type wherein a web (20,127) is wet formed on a forming means (12, 103) and then forwarded to a dryer cylinder (54,150) on an imprinting carrier fabric loop (30,137) without subjecting the web to substantial compaction prior to reaching the dryer cylinder (54,150)and in which apparatus a pressure roll (38,141) is biased with substantial force towards the dryer cylinder to form a nip therebetween through which the web (20,127) backed by the imprinting carrier fabric (30,137) is forwarded onto the dryer cylinder (54,150) and adhered thereto with moisture and pressure responsive adhesive disposed thereon, characterised in that it comprises means for biasing (70,160) a substantial length portion (176,177) of said imprinting carrier fabric loop (30,137) radially inwardly towards a substantial arcuate sector (α1,α2) of said dryer cylinder immediately adjacent and downstream from said nip with said web disposed therebetween.
Claim 8
Dependent Claim
81 words
An apparatus according to Claim 5 wherein said means for biasing (70,160) are adapted to maintain a compressive loading on said substantial length portion (176,177) of said imprinting fabric in the range of from 0.7 to 2.0 kPa, and said substantial length portion is so related to the peripheral velocity of said. dryer cylinder that said web is disposed intermediate said imprinting fabric and said dryer cylinder for a period of from 0.004 to 0.72 seconds immediately downstream from said nip.
Claim 9
Dependent Claim
15 words
An apparatus according to Claim 6 wherein said period is from 0.015 to 0.096 seconds.
References Cited (Backward Citations)
No citation records indexed.
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