US3539384A - Coating apparatus for coating a flexible web - Google Patents

Coating apparatus for coating a flexible web Download PDF

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Publication number
US3539384A
US3539384A US650422A US3539384DA US3539384A US 3539384 A US3539384 A US 3539384A US 650422 A US650422 A US 650422A US 3539384D A US3539384D A US 3539384DA US 3539384 A US3539384 A US 3539384A
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United States
Prior art keywords
roller
coating
film
solution
pick
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Expired - Lifetime
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US650422A
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English (en)
Inventor
Frank P Kolesinskas
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GAF Corp
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GAF Corp
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Publication date
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor

Definitions

  • a pick-up roller having an annular surface rotatable in a liquid coating solution
  • a transfer roller having an annular surface rotatable in spaced relationship with that of the pick-up roller to thereby reverse, split and receive only a portion of the coating solution therefrom, and a moving film web the surface of which is spaced from that of the transfer roller, and also only a portion of the solution carried on the surface of the transfer roller.
  • This invention relates to a method and apparatus for coating a flexible web and, in particular, for applying a uniform layer of coating solution to the surface of a continuously moving web of diazo-type film material.
  • Patented Nov. 10, 1970 "ice overcomes the foregoing and other disadvantages encountered in the prior art, by providing a coating apparatus which includes a rotatable pick-up roller adapted to rotate at high speeds in a trough containing a diazo coating solution, a transfer roller rotatable in a predetermined relationship with the pick-up roller and which receives a portion of the coating solution from the latter, and a continuously moving web of film material adapted to receive the coating solution from the transfer roller.
  • a primary advantage of the use of the transfer roller intermediate to the pick-up roller and the film web is that it has a smoothing eifect on the coating solution removed from the trough by the pick-up roller.
  • a portion of the coating solution picked up by the pick-up roller is transferred to the surface of the transfer roller, while the remainder of the solution passes between the pick-up and transfer rollers and returns to the trough.
  • the portion of the coating solution transferred to the transfer roller is then conveyed by the latter about an angular displacement of at least This will allow. the coating solution on the surface of the transfer roller to smooth itself under the action of gravity.
  • the coating solution is deposited on the surface of a web of film material being conveyed past the transfer roller, and produces a smooth, high quality coating of the solution on the film.
  • the utilization of intermediate transfer rollers will facilitate the high speed operation of reverse roll coating apparatuses, allowing the film to be satisfactorily coated at film speeds in excess of I00 feet/minute.
  • Another object of the present invention is to provide a novel film coating apparatus utilizing a rotatable pickup roller adapted to receive coating solution from a trough, a rotatable transfer roller cooperative with the pick-up roller so as to receive a portion of the coating solution therefrom, and a continuously moving web of film material which is coated with the coating solution carried by the transfer roller.
  • a further object of the present invention is to provide a novel method of coating a moving web of diazo-type film through the use of a reverse roller coating apparatus.
  • a more specific object of the present invention is to provide a novel method of applying a coating solution to the usrface of a moving web of diazo-type film by means of a transfer roller which receives the coating solution from a cooperative rotatable pick-up roller.
  • FIG. 1 is a diagrammatic view of a prior art coating apparatus
  • FIG. 2 is a diagrammatic view of a preferred embodiment of a diazo-type film coating apparatus according to the present invention
  • FIG. 3 is a second embodiment of a coating apparatus according to the present invention.
  • FIG. 4 is a third embodiment of a coating apparatus according to the present invention.
  • FIG. 5 is a fourth embodiment of a coating apparatus according to the present invention.
  • FIG. 6 is a fifth embodiment of a coating apparatus according to the present invention.
  • FIG. 1 illustrates a prior art coating apparatus of the so-called two roll reverse roll bear type.
  • a pick-up or applicator roller 1 is adapted to rotate in a trough 2 containing a quantity ofdiazotype film coating or developer solution.
  • Applicator roller 1 picks up a portion of the coating solution on its surface, and conveys the solution into contact with a moving web of film material 3.
  • Film material 3 is conveyed past applicator roller 1 by means of a conveyor roller 4 which rotates in the same direction as applicator roller 1. Consequently, the solution on applicator roller 1 is transferred to the surface of the film material 3 in a relatively smooth and uniform manner.
  • the diazo-type film coating apparatus 4 includes a pick-up roller 5 rotating in trough 2 which contains a quantity of the developer or film coating solution.
  • a transfer roller 6 is positioned in closely spaced relationship with pick-up roller 5, so as to provide a controllable gap '7 between the rollers. Transfer roller 6 is adapted to the rotated in the same direction as the direction of rotation of pick-up roller 5.
  • Film web 3 is entrained about a conveyor or backing roller 8, and is arranged to move past the surface of transfer roller 6 in closely spaced relationship, forming a gap 9 with transfer roller 6.
  • Backing roller 8 is rotated in the same direction as the direction of rotation of transfer roller 6.
  • pick-up roller 5 is rotated in the trough 2 at relatively high speeds, in excess of to 30 linear feet/minute, picking up a quantity of developer or coating solution on its surface.
  • waves are generated in the solution in the trough 2, which in turn cause the solution on the surface of the pick-up roller to be uneven in thickness, and interspersed with waves and ridges.
  • the solution on pick-up roller 5 reaches the nip or gap 7 between the latter roller and transfer roller 6, a portion of the solution deposited on the surface of the transfer roller, while the remainder of the solution passes through the gap 7 and is returned to the trough 2 along the back portion of pick-up roller 5.
  • the splitting or dividing of the coating solution between pick-up roller 5 and transfer roller 6 will tend to reduce the irregularities and waves in the coating solution transferred to the surface of transfer roller 6.
  • the solution on the surface of transfer roller 6 is rotated toward gap 9 between film web 3 and transfer roller 6, and is deposited onto the surface of the film web in a manner well known in the art.
  • the coating solution on the surface of the transfer roller 6 is rotated through an angular displacement of approximately 270, it will tend to level itself off under the influence of gravity during rotation. In effect, this will assure that a smooth coating of the solution will be deposited uniformly over the contacted surface of film web 3.
  • the transfer roller 6 is rotated at a greater linear peripheral speed than that of pick-up roller 5.
  • film web 3 may be moved at a greater linear speed tran the peripheral surface speed of transfer roller 6. This will permit the coating solution which is removed from trough 2 by pick-up roller 5 to be spread over a larger surface in an equal and uniformly distributed thickness.
  • Typical speed ratios which have been proven to be satisfactory in operation, are rotation of the pickup roller 5 at a linear surface velocity of 4 5 feet/minute, and the film web 3 at a linear velocity of 60 feet/minute.
  • the speed ratio between the transfer roller 6 and pick-up roller 5 may be in the order of 3:2, while similar ratios may be maintained between the film web 3 and transfer roller 6 depending upon the desired coating solution thickness on the film surface.
  • the above mentioned speed ratios, in conjunction with proper adjustments of roller gaps 7 and 9 produce final smooth film coatings of 2.5 cc./ square foot.
  • FIGS. 3, 4 and 5 show the apparatuses wherein the backing rollers 8 are positioned at an angle of from the pick-up rollers 5 when measured about the circumference of the transfer rollers 6.
  • the film web 3 which is entrained about backing roller 8 is conveyed at an angle relative to roller gap 9, whereas in FIG. 4 the film web extends in vertical parallel directions from the backing roller.
  • the web diverges from backing roller 8.
  • the diameters of pick-up roller 5, transfer roller 6 and backing roller 8 may be varied and used in different combinations in order to obtain the desired coating thickness and consistency.
  • the foregoing achieves the basic objective of the invention, by splitting the solution between the pick-up roller and transfer roller, and the subsequent deposit of the solution onto the film web surface; minimizes any disturbances occurring to the liquid meniscus in the solution trough 2; and accurately meters the solution over the web surface at relatively high speeds previ ously unattainable in the prior art.
  • a method of uniformly applying a liquid coating solution to the surface of a rapidly moving web of film material comprising:

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
US650422A 1967-06-30 1967-06-30 Coating apparatus for coating a flexible web Expired - Lifetime US3539384A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65042267A 1967-06-30 1967-06-30

Publications (1)

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US3539384A true US3539384A (en) 1970-11-10

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US650422A Expired - Lifetime US3539384A (en) 1967-06-30 1967-06-30 Coating apparatus for coating a flexible web

Country Status (9)

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US (1) US3539384A (es)
BE (1) BE717361A (es)
CH (1) CH477298A (es)
DE (2) DE1772746A1 (es)
ES (1) ES355606A1 (es)
FR (1) FR1571214A (es)
GB (1) GB1201233A (es)
NL (1) NL6809223A (es)
SE (1) SE340044B (es)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784406A (en) * 1972-01-24 1974-01-08 Esb Inc Method of applying battery electrodes onto continuous carrier strip
US4091129A (en) * 1977-05-16 1978-05-23 Paper Converting Machine Company Method and apparatus for coating using an open-ended ink chamber having restrictions for partially limit ink flow
US4216252A (en) * 1974-12-18 1980-08-05 General Electric Company Solventless release coating
US4282275A (en) * 1980-01-14 1981-08-04 The Mead Corporation Coating method apparatus for capsular coatings
USRE30819E (en) * 1977-05-16 1981-12-08 Paper Converting Machine Company Method for coating using an open-ended ink chamber having restrictions for partially limit ink flow
US4743330A (en) * 1985-05-02 1988-05-10 Tillotson John G Method and apparatus for coating and bonding a secondary carpet backing
US5506005A (en) * 1993-01-13 1996-04-09 Valmet Corporation Method and assembly for preventing air entry between a moving material web and a roll
US6592701B1 (en) * 1997-08-08 2003-07-15 Sollac Method and device for continuous coating of at least one metal strip with a fluid cross-linkable polymer film
US20050281977A1 (en) * 2004-01-23 2005-12-22 Mashburn Larry E Method of carpet construction

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1404616A (en) * 1972-11-27 1975-09-03 Wiggins Teape Research Dev Ltd Apparatus for applying a coating to a web of material
AT374379B (de) * 1982-03-29 1984-04-10 Zimmer Johannes Vorrichtung zum gleichmaessigen auftragen bestimmbarer fluessigkeitsmengen
NO175293C (no) * 1992-07-08 1994-10-05 Gp Tinter As Papirinnfargingsapparat

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2329034A (en) * 1941-01-15 1943-09-07 Imp Paper & Color Corp Apparatus for coating paper
GB788939A (en) * 1954-11-09 1958-01-08 Hall Harding Ltd Improvements in or relating to apparatus for applying liquid to web material
US2870738A (en) * 1957-02-28 1959-01-27 Black Clawson Co Paper coating machine
US3239367A (en) * 1962-02-19 1966-03-08 Demeter Jozsef Method and apparatus for producing plastic coated carriers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2329034A (en) * 1941-01-15 1943-09-07 Imp Paper & Color Corp Apparatus for coating paper
GB788939A (en) * 1954-11-09 1958-01-08 Hall Harding Ltd Improvements in or relating to apparatus for applying liquid to web material
US2870738A (en) * 1957-02-28 1959-01-27 Black Clawson Co Paper coating machine
US3239367A (en) * 1962-02-19 1966-03-08 Demeter Jozsef Method and apparatus for producing plastic coated carriers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784406A (en) * 1972-01-24 1974-01-08 Esb Inc Method of applying battery electrodes onto continuous carrier strip
US4216252A (en) * 1974-12-18 1980-08-05 General Electric Company Solventless release coating
US4091129A (en) * 1977-05-16 1978-05-23 Paper Converting Machine Company Method and apparatus for coating using an open-ended ink chamber having restrictions for partially limit ink flow
USRE30819E (en) * 1977-05-16 1981-12-08 Paper Converting Machine Company Method for coating using an open-ended ink chamber having restrictions for partially limit ink flow
US4282275A (en) * 1980-01-14 1981-08-04 The Mead Corporation Coating method apparatus for capsular coatings
US4743330A (en) * 1985-05-02 1988-05-10 Tillotson John G Method and apparatus for coating and bonding a secondary carpet backing
US5506005A (en) * 1993-01-13 1996-04-09 Valmet Corporation Method and assembly for preventing air entry between a moving material web and a roll
US6592701B1 (en) * 1997-08-08 2003-07-15 Sollac Method and device for continuous coating of at least one metal strip with a fluid cross-linkable polymer film
US20050281977A1 (en) * 2004-01-23 2005-12-22 Mashburn Larry E Method of carpet construction

Also Published As

Publication number Publication date
ES355606A1 (es) 1970-03-01
CH477298A (de) 1969-08-31
SE340044B (es) 1971-11-01
NL6809223A (es) 1968-12-31
DE1772746A1 (de) 1970-09-10
GB1201233A (en) 1970-08-05
FR1571214A (es) 1969-06-13
BE717361A (es) 1968-12-30
DE6753765U (de) 1969-09-04

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