US3846816A - Printing plate processor and means for opening and closing the same - Google Patents

Printing plate processor and means for opening and closing the same Download PDF

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Publication number
US3846816A
US3846816A US00349736A US34973673A US3846816A US 3846816 A US3846816 A US 3846816A US 00349736 A US00349736 A US 00349736A US 34973673 A US34973673 A US 34973673A US 3846816 A US3846816 A US 3846816A
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United States
Prior art keywords
section
plate
processor
upper section
accordance
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Expired - Lifetime
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US00349736A
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English (en)
Inventor
E Gaisser
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CNA Holdings LLC
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Hoechst Celanese Corp
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/26—Processing photosensitive materials; Apparatus therefor
    • G03F7/30—Imagewise removal using liquid means
    • G03F7/3042—Imagewise removal using liquid means from printing plates transported horizontally through the processing stations

Definitions

  • ABSTRACT A printing plate processor through which an exposed printing plate travels in a straight line path, which is divided into a fixed lower section and a pivotal upper section, pivotally mounted on the lower section adjacent one end thereof, along a plane coincident with the path of travel of the plate therethrough and having an extension jack, having one end attached to the lower section and the other end attached to the upper section to pivot the upper section about its pivot point, and thereby lower and raise the upper section, feed rollers, a multiple treatment processing unit, having at least a part thereof mountain the upper tion, can be included in the processing unit ahead of the washing section.
  • This invention relates to an apparatus for processing printing plates and, more particularly, to a printing plate processing apparatus with opening and closing means to permit cleaning and servicing.
  • Conventional offset printing plates usually comprise a thin sheet of aluminum coated with a light-sensitive layer which contains, among other things, one or more resins.
  • Such sensitized printing plates may be made ready for printing by the platemaker by various manual techniques.
  • the plate-maker either purchases the raw aluminum and then treats it in various fashions, known to the industry, to prepare itfor coating with one of several commercially available lightsensitive emulsions, or he purchases the aluminum preprepared for such coating.
  • the coatings are then applied to the aluminum carrier in one 'of several known ways and the coating is then dried.
  • These presensitized plates are then ready for use in printing by the printer.
  • the platemaker may purchase a preprepared, precoated plate conventionally known as presensitized offset printing plate. I
  • the presensitized offset printing plate is thereafter exposed, through a stencil, to a source of strong actinic light, for example, a carbon arc.
  • a source of strong actinic light for example, a carbon arc.
  • the light-sensitive coating when subjected to such light, is converted in such a manner that, after development, the image areas are retained on the plate surface and the non-image areas are removed or vice versa.
  • the exposed printing plate may then be developed by what is known as the hand developing process.
  • the plate is first rubbed with a sponge or the like saturated with a developing agent to rub the developing agent into the surface of the plate.
  • the plate may be fixed and/or washed and finally, a coating of material, such as, gum arabic, is applied to the surface of the plate to protect the image-free areas.
  • the plate is then ready for the printing press.
  • this hand-developing process for producing a printing plate involves the following procedure: From a typewritten setup or makeup, equivalent to the material to be printed and provided in any desired manner, including typed articles, pictures of various kinds of art work of different sizes, and the like, all assembled onto a suitable cardboard or other support, a master is prepared in the conventional manner. The image of the master is then transferred onto the sensitized printing plate, as previously described, by a suitable exposure techniqu e The printing member thus prepared is then subjected to a developing operation utilizing the chemistry prescribed by the manufacturer of the printing plate.
  • This chemistry is worked into the exposed coating by hand-rubbing, for example, with a sponge, until the non-image areas are subtracted or removed from the carrier leaving an exact replica of the image on the plate carrier. Obviously, in the alternate process, the image areas may be removed leaving the non-image areas on the carrier plate.
  • the printing member is then fixed and/or washed and a solution of gum arabic or a similar solution, is applied to the plate surface, result- 2 ing in a printing plate which is ready for the printing press.
  • the primary object of the present invention to overcome the above-mentioned difficulties of the prior art and to provide a novel processing apparatus which is easily accessible for repair, cleaning and other servicing.
  • the apparatus of the present invention is applicable to any of a variety of printing plate processing apparati, and particularly to printing plate developing apparatus where developing fluid is supplied to the apparatus under pressure
  • the invention is best adapted for use in conjunction with a processing apparatus in which the plate travels in a straight line path through the machine, starting with an exposed plate and ending with a dried plate ready for use by the printer.
  • processing apparatus generically includes a developing section, which is supplied with a developing fluid under pressure, a washing section, a lacquering or gumming section and a drying section.
  • the developer section generally includes a station in which developer fluid is sprayed under pressure onto the exposed surface of the plate in order to develop the plate and permit removed coating to flow free of the plate, a cleaning section where moving brushes and additional developer spray clean the surface of residual unwanted portions of the 5 tion may be a similar section where a fixing solution is applied to the plate.
  • a washing section where it is washed free of any residual developing and fixing fluids.
  • the plate then passes to a lacquering or gumming section where a protective coating, such as, gum arabic, is applied.
  • a drying section where the plate is dried and discharged as a completed plate ready for the printing press.
  • Such apparatus may utilize the conventional approach of processing a printing plate which is coated and imaged on one side only, it preferably utilizes a technique in which a plate is coated and imaged on both sides or two back-to-back plates coated and imaged on one side are processed simultaneously.
  • driven rollers which transport the plate through the apparatus are located below the plane of travel of the plate through the apparatus while at least a part of the processing components of the system and idler rollers cooperating with the driven rollers are located above the plane of travel of the plate through the apparatus.
  • Such apparatus normally has a hinged lid or a cover which may be removed in some fashion in order to clean or service the apparatus or to remove a jammed plate, such cleaning, servicing and plate removal are not without difficulty.
  • processing apparatus of the character described above, or any one or “more components thereof, is divided into a lower fixed section and an upper pivotal section along a plane parallel to the path of travel of the plate member passing through the apparatus.
  • An opening and closing means is operatively connected to the pivotally mounted upper section.
  • the opening and closing means must be capable of lifting the heavy upper section, carrying the idler rollers and one or more of the processing components. Therefore, the opening and closing device must be a positive-acting mechanism adapted to raise the upper section without sway or misalignment of any type in such movement, which might damage the apparatus.
  • the opening and closing means may include a jack of any conventional type, such as, an electric screw-type, a pneumatic type or a hydraulic type.
  • a screw-type jack is particularly desirable for use in the present invention, since such a jack can be used to obtain a predetermined pressure between the two sections of the machine when it is in its closed position, this, also maintaining a predetermined pressure between the driving and driven rollers of the apparatus,
  • the apparatus which transport the plate through the apparatus, and a predetermined pressure between the processing components and the plate.
  • the apparatus is designed to process a plate coated and imaged on both sides or two back-to-back coated and images on one side.
  • One jack can be mounted on one side of the apparatus or a pair of jacks can be mounted on either side of the apparatus, if desired.
  • the opening of the apparatus is actuated by a switch on the apparatus itself or on a convethe apparatus is that an automatic pressure-type circuit breaker can be positioned on the two sections of the machine so that when the machine is initially opened, the power circuit to the processing apparatus is broken, thus, making the machine completely safe for an operator to service.
  • Such a pressure-type circuit breaker also has the advantage that it will deenergize the processing apparatus power system until the two sections have been completely closed, thus, guaranteeing that the two sections will be properly positioned with relation toone another prior to the insertion of a printing plate into the apparatus.
  • FIG. 1 is an overall view of the apparatus of the present invention in its normal operating position and, in broken outline form, in its open position for cleaning or other servicing, and
  • FIG. 2 is a detailed view, partially in section, of the processing portion of the apparatus of FIG. 1.
  • a base is composed of legs 2 and 4 with cross members 6 and 8. Fixedly mounted adjacent the top of legs 2 and 4 is the lower section 10 of the processing apparatus. Fixedly attached to the lower section 10 are upstanding support plates 12, mounted on either side of lower section 10. The upper portion of support plates 12, which extend above lower section 10, carrying pivot means 14. The upper section 16 of the processing apparatus is operatively coupled to the lower section 10 through pivot means 14, thereby permitting the upper section 16 to be pivoted upwardly as shown in the broken outline form.
  • a planographic printing plate which has been sensitized and imaged by exposure to a'desired master, is inserted into the machine in the direction shown by the arrow 18.
  • a protruding feed table 20" is located at the feed end of the lower section 10 of the processing apparatus.
  • upper idler rollers 24 In intimate contact with the top of the plate being processed, and driven by contact with the plate, are upper idler rollers 24.
  • a developing section 26 Shown specifically are a washing section 28, a lacquering or gumming section 30 and a driving section 32.
  • the driven rollers 22 are driven continuously so long as power is supplied to the processing apparatus and the upper section 16 and the lower section 10 are in contact with one another. With the machine in its closed position, an upper portion 34 and a lower portion 36 of a pressure-type circuit breaker are in contact with one another and the circuit supplying power to the processing apparatus is completed. When, however, the upper section 16 of the machine is raised, the contact between portions 34 adn 36 of the circuit breaker is broken and power is no longer supplied to the processing apparatus. This represents a significant safety feature in that all power is off when the processing apparatus is not closed and is not in its operating position. i
  • switch 38 is thrown in one of the two directions to operate jack 40 and raise the upper section 16 of the processing apparatus.
  • Switch 38 may be an appropriate toggle switch mounted either on the side of the lower section of the processing apparatus or on a separate control panel.
  • Jack 40 may take any one of several forms. Jack 40, preferably, is a screwtype electrically-operated jack. However, any type of pneumatic, hydraulic or similar jack can also be utilized.
  • Extension rod 42 of jack 40 is pivotally connected to the upper section 16 of the machine by means of pivot 44.
  • the lower cylinder section 46 of the jack 40 is mounted on cross member 8 through mounting plate 48 and pivot means 50.
  • motor housing or support 52 Also mounted on the cylinder portion 46 of jack 40 is an appropriate motor housing or support 52. As may be seen from the drawing, when the switch 38 is actuated and extension rod 42 of the jack 40 is extended, the motor housing 52 pivots downwardly and in doing so will contact limit switch 54. The limit switch 54 turns off the power to the jack 40, thereby preventing it from overrunning or overextending.
  • the master power control is on and sections 10 and 16 of the machine are in contact with one another and power is being supplied to the entire processing sequence.
  • a plate is fed into the machine as shown and driven rollers 22 drive the plate through the processing apparatus. Since upper idler rollers 24 are in intimate contact with the plate, the plate will, in turn, drive the idler rollers.
  • switch 38 is thrown to the up position, thereby actuating jack 40. Jack 40 raises the upper section 16 of the machine until the motor housing 52 contacts limit switch 54. When limit switch 54 is contacted, the power is shut off to the jack and the upper section 16 stops at a predetermined upper position.
  • a planographic printing plate sensitized on both sides and imaged on both sides by exposure to a desired master, is,
  • the plate passes through a pair of feed rollers 22a and 24a, and thence to the developing section 26.
  • the developing section 26 is made up of a pair of shielded developer dispensers 56, which introduces developer onto the plate to soften the coating in the nonimage areas. Developer is fed to the dispensers 56 from a suitable source of developer under pressure (not shown).
  • the plate then passes to cleaning and scrubbing subassembly 58. Cleaning and scrubbing subassembly 58 is made up of cleaning brushs 60.
  • the cleaning brushes 60 may be flat brushes as shown or rotary brushes.
  • Cleaning brushes 60 are reciprocatable and thus these brushes rub against the plate to clean the softened, unwanted coating from the plate.
  • developer solution is also supplied between the tufts of the brushes through conduits 62 to provide a simultaneous washing action.
  • This developer fluid is also under pressure from a source of developer fluid (not shown).
  • the plate then passes to scrubbing pads 64, mounted on subassembly 58, which are also reciprocatable with the brushes 60.
  • These scrubber pads 64 are covered with a suitable soft material, such as, velour, for example.
  • the scrubbing pads are also supplied with developer under pressure through conduits 66 from a suitable source of developer (not shown).
  • the plate Upon exiting from the scrubber pads, the plate passes between squeegee rollers 22b and 24b. If any coating particles remain on the surface of the plate, they usually will attach themselves to the surface of the squeegee rollers since these rollers are covered with a material, such as, synthetic rubber which has a greater affinity for the particles of coating than does the metal of the plate. Particles adhering to the squeegee rollers 22b and 24b are removed by the cleaning pads 68. These cleaning pads 68 reciprocate together with scrubber pads 64 and brushes 60 and thus traverse the surface of the squeegee rollers 22b and 24b to effectively clean them. As indicated, the entire subassembly 58 is .reciprocatable to thus reciprocate brushes60, scrubber pads 64 and cleaning pads 68.
  • pair of dischargeroller means and a pair of processing 8 means adapted to contact both sides of said plate and subject said both sides of said plate to identical mechanical action; one each of said pairs of feed means, discharge means and processing means being mounted in said lower section and the other of said pairs being mounted in said upper section; and extension jack means, having one end thereof attached to said lower section and the other end' thereof attached to said upper section, to lower and raise said upper section,
  • said plate is beingprocessed.
  • each of the processing means includes a developing section.
  • each of the processing means includes a washing section, a lacquering' section and a drying section sequentially mounted following the developing section.
  • a processor in accordacne with claim 1 wherein a normally-closed, pressure-type circuit breaker is operatively connected to the upper section and the lower section to break the power circuit to the processor when the upper section is opened.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Projection-Type Copiers In General (AREA)
US00349736A 1971-10-21 1973-04-10 Printing plate processor and means for opening and closing the same Expired - Lifetime US3846816A (en)

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US19119271A 1971-10-21 1971-10-21

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US3846816A true US3846816A (en) 1974-11-05

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US (1) US3846816A (enrdf_load_stackoverflow)
JP (1) JPS5545893B2 (enrdf_load_stackoverflow)
AT (1) AT330211B (enrdf_load_stackoverflow)
CA (1) CA985088A (enrdf_load_stackoverflow)
DE (1) DE2250279B2 (enrdf_load_stackoverflow)
ES (1) ES407756A1 (enrdf_load_stackoverflow)
GB (1) GB1408638A (enrdf_load_stackoverflow)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916426A (en) * 1974-07-01 1975-10-28 Polychrome Corp Apparatus for developing offset printing plates
US4081577A (en) * 1973-12-26 1978-03-28 American Hoechst Corporation Pulsed spray of fluids
US4310616A (en) * 1977-04-19 1982-01-12 Fuji Photo Film Co., Ltd. Method and apparatus for developing and treating PS plates
US4428659A (en) 1981-06-02 1984-01-31 Napp Systems (Usa), Inc. Apparatus and method for removing soluble portions of a coating
US4493123A (en) * 1982-11-26 1985-01-15 Hoechst Aktiengesellschaft Pressure-contact and lift-off arrangement
US4588277A (en) * 1984-06-22 1986-05-13 Robert Buckler Waterless lithographic plate processor
EP0206308A1 (en) * 1985-06-27 1986-12-30 Fuji Photo Film Co., Ltd. Developing method for photosensitive material
US5353088A (en) * 1993-05-03 1994-10-04 Eastman Kodak Company Automatic tray processor
US5400106A (en) * 1993-05-03 1995-03-21 Eastman Kodak Company Automatic tray processor
US5907882A (en) * 1997-11-19 1999-06-01 Tyree; Bill Lottery ticket scratch off device
US6138566A (en) * 1997-09-30 2000-10-31 Dainippon Screen Meg Co., Ltd Method and apparatus for developing printing plates in press
US20040064906A1 (en) * 2002-10-04 2004-04-08 Jerry Behar Scrubber and method of using scrubber
US20040075212A1 (en) * 2002-08-22 2004-04-22 Heidelberger Druckmaschinen Ag Protective device for a delivery device
US20080101792A1 (en) * 2006-10-27 2008-05-01 Fromson Howard A Spray development of photosensitive plates
US20100223741A1 (en) * 2006-02-17 2010-09-09 Bsh Bosch Und Siemens Hausgerate Gmbh Cleaning Device for a Component of a Household Washer-Dryer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61207242U (enrdf_load_stackoverflow) * 1985-06-19 1986-12-27
JPS6249155U (enrdf_load_stackoverflow) * 1985-09-14 1987-03-26
CN114683681B (zh) * 2022-04-01 2023-12-05 绍兴泽瑞数控印花科技有限公司 一种湿法转印工艺中使用的布与印花辊接触面积可调装置

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US85426A (en) * 1868-12-29 Improved machine for coloring paper
US930700A (en) * 1908-08-11 1909-08-10 F F Slocomb & Company Inc Attachment to leather-seasoning machines.
US1275410A (en) * 1916-07-24 1918-08-13 Carl A Erickson Printing-machine.
US1561953A (en) * 1919-11-15 1925-11-17 Ernest J Sweetland Method of and apparatus for developing films
US2677320A (en) * 1946-12-23 1954-05-04 John S Swift Co Inc Developing head for phtolithographic plate treating machines
US2738972A (en) * 1953-01-30 1956-03-20 Northrop Aircraft Inc Resilient trunnion actuator support
US2768532A (en) * 1952-09-13 1956-10-30 Eaton Mfg Co Power transmitting mechanism
US2913975A (en) * 1956-10-17 1959-11-24 Psc Applied Res Ltd Film processor
US3552293A (en) * 1968-08-30 1971-01-05 Eastman Kodak Co Web processing device
US3608464A (en) * 1968-05-14 1971-09-28 Western Litho Plate & Supply Apparatus for developing lithographic plates
US3682079A (en) * 1969-04-09 1972-08-08 Edward A Casson Jr Automatic lithographic plate developing machine
US3732808A (en) * 1971-03-18 1973-05-15 Polychrome Corp Apparatus for developing offset printing plates

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US3490842A (en) * 1966-10-18 1970-01-20 Sunbeam Business Equipment Co Electrophotostatic copying machine

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US85426A (en) * 1868-12-29 Improved machine for coloring paper
US930700A (en) * 1908-08-11 1909-08-10 F F Slocomb & Company Inc Attachment to leather-seasoning machines.
US1275410A (en) * 1916-07-24 1918-08-13 Carl A Erickson Printing-machine.
US1561953A (en) * 1919-11-15 1925-11-17 Ernest J Sweetland Method of and apparatus for developing films
US2677320A (en) * 1946-12-23 1954-05-04 John S Swift Co Inc Developing head for phtolithographic plate treating machines
US2768532A (en) * 1952-09-13 1956-10-30 Eaton Mfg Co Power transmitting mechanism
US2738972A (en) * 1953-01-30 1956-03-20 Northrop Aircraft Inc Resilient trunnion actuator support
US2913975A (en) * 1956-10-17 1959-11-24 Psc Applied Res Ltd Film processor
US3608464A (en) * 1968-05-14 1971-09-28 Western Litho Plate & Supply Apparatus for developing lithographic plates
US3552293A (en) * 1968-08-30 1971-01-05 Eastman Kodak Co Web processing device
US3682079A (en) * 1969-04-09 1972-08-08 Edward A Casson Jr Automatic lithographic plate developing machine
US3732808A (en) * 1971-03-18 1973-05-15 Polychrome Corp Apparatus for developing offset printing plates

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4081577A (en) * 1973-12-26 1978-03-28 American Hoechst Corporation Pulsed spray of fluids
US3916426A (en) * 1974-07-01 1975-10-28 Polychrome Corp Apparatus for developing offset printing plates
US4310616A (en) * 1977-04-19 1982-01-12 Fuji Photo Film Co., Ltd. Method and apparatus for developing and treating PS plates
US4428659A (en) 1981-06-02 1984-01-31 Napp Systems (Usa), Inc. Apparatus and method for removing soluble portions of a coating
US4493123A (en) * 1982-11-26 1985-01-15 Hoechst Aktiengesellschaft Pressure-contact and lift-off arrangement
US4588277A (en) * 1984-06-22 1986-05-13 Robert Buckler Waterless lithographic plate processor
EP0206308A1 (en) * 1985-06-27 1986-12-30 Fuji Photo Film Co., Ltd. Developing method for photosensitive material
US4837131A (en) * 1985-06-27 1989-06-06 Fuji Photo Film Co., Ltd. Developing method for photosensitive material
US5353088A (en) * 1993-05-03 1994-10-04 Eastman Kodak Company Automatic tray processor
US5400106A (en) * 1993-05-03 1995-03-21 Eastman Kodak Company Automatic tray processor
US6138566A (en) * 1997-09-30 2000-10-31 Dainippon Screen Meg Co., Ltd Method and apparatus for developing printing plates in press
US5907882A (en) * 1997-11-19 1999-06-01 Tyree; Bill Lottery ticket scratch off device
US20040075212A1 (en) * 2002-08-22 2004-04-22 Heidelberger Druckmaschinen Ag Protective device for a delivery device
US7073788B2 (en) * 2002-08-22 2006-07-11 Heidelberger Druckmaschinen Ag Protective device for a delivery device
US20040064906A1 (en) * 2002-10-04 2004-04-08 Jerry Behar Scrubber and method of using scrubber
WO2004032675A1 (en) * 2002-10-04 2004-04-22 Jerry Behar Scrubber and method of using scrubber
US20100223741A1 (en) * 2006-02-17 2010-09-09 Bsh Bosch Und Siemens Hausgerate Gmbh Cleaning Device for a Component of a Household Washer-Dryer
US8490294B2 (en) * 2006-02-17 2013-07-23 Bsh Bosch Und Siemens Hausgeraete Gmbh Cleaning device for a component of a household washer-dryer
US20080101792A1 (en) * 2006-10-27 2008-05-01 Fromson Howard A Spray development of photosensitive plates
US7441968B2 (en) * 2006-10-27 2008-10-28 Anocoil Corporation Spray development of photosensitive plates

Also Published As

Publication number Publication date
JPS4873209A (enrdf_load_stackoverflow) 1973-10-03
CA985088A (en) 1976-03-09
GB1408638A (en) 1975-10-01
ATA892072A (de) 1975-09-15
JPS5545893B2 (enrdf_load_stackoverflow) 1980-11-20
DE2250279A1 (de) 1973-04-26
AT330211B (de) 1976-06-25
ES407756A1 (es) 1975-10-16
DE2250279B2 (de) 1977-10-27

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