US3604393A - Squeegee roller arrangement - Google Patents

Squeegee roller arrangement Download PDF

Info

Publication number
US3604393A
US3604393A US839962A US3604393DA US3604393A US 3604393 A US3604393 A US 3604393A US 839962 A US839962 A US 839962A US 3604393D A US3604393D A US 3604393DA US 3604393 A US3604393 A US 3604393A
Authority
US
United States
Prior art keywords
roller
rollers
lower roller
liquid
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US839962A
Inventor
Anthony Earle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Application granted granted Critical
Publication of US3604393A publication Critical patent/US3604393A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D5/00—Liquid processing apparatus in which no immersion is effected; Washing apparatus in which no immersion is effected
    • G03D5/06—Applicator pads, rollers or strips
    • G03D5/067—Rollers
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D13/00—Processing apparatus or accessories therefor, not covered by groups G11B3/00 - G11B11/00
    • G03D13/003—Film feed or extraction in development apparatus

Definitions

  • This invention relates to roller arrangements for apparatus such as photographic processing apparatus in which excess liquid applied to a sheet, web or film is removed by a pair of rollers in the roller arrangement.
  • One roller arrangement used in a photographic print processing apparatus comprises a pair of similar rubber covered rollers respectively mounted for rotation about horizontal axes, one roller being disposed vertically above the other, and the lower roller being partly immersed in a bath of processing liquid.
  • the rollers are driven in opposite senses to produce forward movement of a print being passed therebetween, and the lower roller acts as an applicator roller to apply processing liquid to the lower side of the print.
  • Excess liquid squeezed from the print as it enters the nip of the roller forms a liquid bead in front of the nip and may return to the bath.
  • the outer surface of the lower one of the pair of rollers is of substantially the same axial length as the cooperating surface of the other roller during operation, and the ends of the said lower roller are formed so that an acute angle is defined at each peripheral edge between its outer surface and the adjacent portion of the end of the roller.
  • the cooperating surface of the lower roller is preferably slightly longer rather than shorter than the cooperating surface of the upper roller.
  • the ends of the lower roller may be of dished form to produce the desired sharp peripheral edge.
  • the rollers may be urged together by pressure which causes deformation of the end faces of the lower roller during operation.
  • the roller arrangement comprises an upper roller 11 and a lower roller 12, both rollers preferably having a cylindrical outer surface provided by a coating of rubber, l3 and 14, or other deformable material, on a shaft, 15 and 16.
  • the shaft 16 of lower roller 12 is mounted horizontally in bearings in spaced vertically disposed support members 17 so that the outer surface can dip into processing liquid 18 contained in a trough 19.
  • the shaft 15 ofupper roller 11 is also carried by movable bearings in the support members 17, and this roller is biased downwardly by springs 20 into contact with the lower roller to form a substantially horizontal nip therebetween.
  • the upper and lower rollers have cylindrical outer surfaces of similar radius and substantially identical length. When the rollers are pressed together for operation the lower roller may be as long as the upper roller or may be marginally greater in len th, say 0.01 inch longer.
  • e ends 21 of the lower roller 12 are concave so as to produce sharp peripheral edges 22 to the cylindrical outer surface of this roller.
  • the ends are concave and may be dished or, as shown, frustoconical in shape. In the latter case successful operation has been obtained with an acute angle at the peripheral edge of from 65 to 70 between the outer surface and each end face.
  • the pressure between the rollers produced by the springs 20 is preferably sufficient to deform the lower roller 12 to form a lip 23 at its ends and reduce the acute angle at the peripheral edge between the rollers. This deformation of the end faces of the lower roller tends to deflect away from the upper roller any liquid which is carried upwardly by the end faces of the lower roller.
  • the present invention provides a novel roller construction utilizing concave end surfaces whereby the upper roller is not wet by liquids being transferred thereto by the end of the lower roller.
  • the possibility that a sheet or web being transported by the rollers will have the upper surface wetted is reduced or eliminated.
  • a roller arrangement comprising a pair of substantially horizontally disposed rollers, said rollers being longitudinally and axially aligned with one roller above the other forming a substantially horizontal nip therebetween, the lower roller being at least partially immersed in a liquid and having a resilient peripheral surface, the ends of said lower roller having a concave configuration which is symmetrical about the roller axis and which forms an acute angle between the peripheral surface and each end surface whereby liquid is not transferred around the ends of the lower roller to wet the upper roller.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Abstract

In an arrangement of a vertical pair of rollers for transporting a sheet therebetween while applying a liquid to the lower surface of the sheet, providing the ends of the lower roller with a concave configuration to prevent wetting the upper roller and the upper surface of the sheet.

Description

United States Patent Appl. No. Filed Patented Assignee SQUEEGEE ROLLER ARRANGEMENT [56] References Cited UNITED STATES PATENTS 432,606 7/ 1890 Dawson 1 18/250 1,494,094 5/1924 Allen I 18/250 X 2,203,250 6/ 1940 Bolhotner et a1. 1 18/247 Primary Examiner-John P. McIntosh Attorneys-Walter O. Hodsdon and Robert L. Randall 4 claims 1 Drawing ABSTRACT: In an arrangement of a vertical pair of rollers for US. Cl. 118/249 transporting a sheet therebetween while applying a liquid to B05c 1/00 the lower surface of the sheet, providing the ends of the lower Field of Search 1 18/249. roller with a concave configuration to prevent wetting the 250. 247. 258. DIG. 15; 68/202 upper roller and the upper surface of the sheet.
""ZTJIIE f T J gfg PATENTEDSEPMIHYI 3,504 393 ANTHONY EARLE A TTORNEYS SQUEEGEE ROLLER ARRANGEMENT BACKGROUND OF THE INVENTION This invention relates to roller arrangements for apparatus such as photographic processing apparatus in which excess liquid applied to a sheet, web or film is removed by a pair of rollers in the roller arrangement.
One roller arrangement used in a photographic print processing apparatus comprises a pair of similar rubber covered rollers respectively mounted for rotation about horizontal axes, one roller being disposed vertically above the other, and the lower roller being partly immersed in a bath of processing liquid. During operation the rollers are driven in opposite senses to produce forward movement of a print being passed therebetween, and the lower roller acts as an applicator roller to apply processing liquid to the lower side of the print. Excess liquid squeezed from the print as it enters the nip of the roller forms a liquid bead in front of the nip and may return to the bath. Under some conditions there is a tendency for liquid from the bead to travel around the ends of the lower roller and wet the upper roller. This may cause undesirable rewetting of the print, and it is an object of the present invention to provide a roller arrangement which reduces or obviates this tendency.
SUMMARY OF THE INVENTION According to the present invention, in a roller arrangement for a photographic processing apparatus or other apparatus in which excess liquid is removed from a sheet, web or film by a pair of rollers in the roller arrangement, the outer surface of the lower one of the pair of rollers is of substantially the same axial length as the cooperating surface of the other roller during operation, and the ends of the said lower roller are formed so that an acute angle is defined at each peripheral edge between its outer surface and the adjacent portion of the end of the roller.
The cooperating surface of the lower roller is preferably slightly longer rather than shorter than the cooperating surface of the upper roller.
The ends of the lower roller may be of dished form to produce the desired sharp peripheral edge.
The rollers may be urged together by pressure which causes deformation of the end faces of the lower roller during operation.
The various features of novelty which characterize the present invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, its operating advantages and the specific objects obtained by its use, reference should be had to the accompanying drawing and descriptive matter in which a preferred embodiment of the present invention is illustrated and described.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawing, the roller arrangement comprises an upper roller 11 and a lower roller 12, both rollers preferably having a cylindrical outer surface provided by a coating of rubber, l3 and 14, or other deformable material, on a shaft, 15 and 16. The shaft 16 of lower roller 12 is mounted horizontally in bearings in spaced vertically disposed support members 17 so that the outer surface can dip into processing liquid 18 contained in a trough 19. The shaft 15 ofupper roller 11 is also carried by movable bearings in the support members 17, and this roller is biased downwardly by springs 20 into contact with the lower roller to form a substantially horizontal nip therebetween.
The upper and lower rollers have cylindrical outer surfaces of similar radius and substantially identical length. When the rollers are pressed together for operation the lower roller may be as long as the upper roller or may be marginally greater in len th, say 0.01 inch longer.
e ends 21 of the lower roller 12 are concave so as to produce sharp peripheral edges 22 to the cylindrical outer surface of this roller. For this purpose the ends are concave and may be dished or, as shown, frustoconical in shape. In the latter case successful operation has been obtained with an acute angle at the peripheral edge of from 65 to 70 between the outer surface and each end face. The pressure between the rollers produced by the springs 20 is preferably sufficient to deform the lower roller 12 to form a lip 23 at its ends and reduce the acute angle at the peripheral edge between the rollers. This deformation of the end faces of the lower roller tends to deflect away from the upper roller any liquid which is carried upwardly by the end faces of the lower roller.
In operation of the processing apparatus a sheet of photographic paper is passed between the rollers 11 and 12. The rollers rotate in opposite senses with the sheet, and the lower roller applies liquid from the trough to the underside of the sheet. Excess liquid is removed by the rollers. Effective operation of the roller arrangement has been obtained in practice with a decreased tendency for wetting of the top surface of the sheet.
Although the invention has been described in relation to a roller arrangement having a lower roller which constitutes a liquid applicator it should be appreciated that the invention is also applicable to arrangements where liquid is only removed from the sheet, web or film.
Thus, it will be seen that the present invention provides a novel roller construction utilizing concave end surfaces whereby the upper roller is not wet by liquids being transferred thereto by the end of the lower roller. As a result, the possibility that a sheet or web being transported by the rollers will have the upper surface wetted is reduced or eliminated.
The invention has been described in detail with particular reference to preferred embodiments thereof, but it will be un derstood that variations and modifications can be effected within the spirit and scope of the invention.
We claim:
1. In a roller arrangement comprising a pair of substantially horizontally disposed rollers, said rollers being longitudinally and axially aligned with one roller above the other forming a substantially horizontal nip therebetween, the lower roller being at least partially immersed in a liquid and having a resilient peripheral surface, the ends of said lower roller having a concave configuration which is symmetrical about the roller axis and which forms an acute angle between the peripheral surface and each end surface whereby liquid is not transferred around the ends of the lower roller to wet the upper roller.
2. The invention according to claim 1 wherein the length of the lower roller is at least equal to the length of the upper roller.
3. The invention according to claim 1 wherein the upper and the lower rollers are urged together by a radial force whereby the end surfaces of the lower roller are deformed.
4. The invention according to claim 1 wherein the acute angle is between 65 and 70.

Claims (4)

1. In a roller arrangement comprising a pair of substantially horizontally disposed rollers, said rollers being longitudinally and axially aligned with one roller above the other forming a substantially horizontal nip therebetween, the lower roller being at least partially immersed in a liquid and having a resilient peripheral surface, the ends of said lower roller having a concave configuration which is symmetrical about the roller axis and which forms an acute angle between the peripheral surface and each end surface whereby liquid is not transferred around the ends of the lower roller to wet the upper roller.
2. The invention according to claim 1 wherein the length of the lower roller is at least equal to the length of the upper roller.
3. The invention according to claim 1 wherein the upper and the lower rollers are urged together by a radial force whereby the end surfaces of the lower roller are deformed.
4. The invention according to claim 1 wherein the acute angle is between 65* and 70*.
US839962A 1969-07-08 1969-07-08 Squeegee roller arrangement Expired - Lifetime US3604393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83996269A 1969-07-08 1969-07-08

Publications (1)

Publication Number Publication Date
US3604393A true US3604393A (en) 1971-09-14

Family

ID=25281097

Family Applications (1)

Application Number Title Priority Date Filing Date
US839962A Expired - Lifetime US3604393A (en) 1969-07-08 1969-07-08 Squeegee roller arrangement

Country Status (1)

Country Link
US (1) US3604393A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5102491A (en) * 1988-12-09 1992-04-07 Morton International, Inc. Wet lamination process and apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US432606A (en) * 1890-07-22 Envelope-mo istener
US1494094A (en) * 1923-07-14 1924-05-13 David L Allen Device for moistening and sealing envelopes
US2203250A (en) * 1939-01-11 1940-06-04 Emil F Pelikan Device for applying treating material to leather

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US432606A (en) * 1890-07-22 Envelope-mo istener
US1494094A (en) * 1923-07-14 1924-05-13 David L Allen Device for moistening and sealing envelopes
US2203250A (en) * 1939-01-11 1940-06-04 Emil F Pelikan Device for applying treating material to leather

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5102491A (en) * 1988-12-09 1992-04-07 Morton International, Inc. Wet lamination process and apparatus

Similar Documents

Publication Publication Date Title
US3285169A (en) Apparatus and method for flexographic printing with doctor roll ink control
US2861541A (en) Device for coating a traveling sheet
US2874674A (en) Apparatus for coating
US3848439A (en) Device for impregnating and dyeing wide textile webs
US3604393A (en) Squeegee roller arrangement
US3379171A (en) Release agent coating apparatus
US2981171A (en) Developer process and apparatus
US3906536A (en) Apparatus for processing printing plates precoated on both sides
US3132581A (en) Cold process lamination machine
ES431557A1 (en) Drying process
GB1465813A (en) Apparatus for treating sheet or plate material with a liquid
US4836129A (en) Apparatus for coating a web with wet ink thereon
US3203392A (en) Freely supported rod for smoothing coating composition applied to webs
US4033290A (en) Apparatus for coating sheet material
US3417693A (en) Device for reducing turbulence in printing press fountains
CN212189818U (en) Oil-proof paper bag production line is with rubber coating mechanism
US3863597A (en) Device for applying a coating layer
US3402656A (en) Roller squeegee
JPS6151314A (en) Continuous vacuum impregnating apparatus for sheet shaped substance
US3229661A (en) Pneumatically biased, mutually opposed, pivotal doctor means
US1589329A (en) Process of electrodepositing rubber upon a metal wire
GB1138683A (en) Improvements in coating machines
US2573052A (en) Liquid coating device
JPS5922149Y2 (en) Device that applies liquid to fabric
US3753174A (en) Developing unit