US3292535A - Protective sleeve - Google Patents

Protective sleeve Download PDF

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US3292535A
US3292535A US391124A US39112464A US3292535A US 3292535 A US3292535 A US 3292535A US 391124 A US391124 A US 391124A US 39112464 A US39112464 A US 39112464A US 3292535 A US3292535 A US 3292535A
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cylinder
shaft
cylindrical
face
printing
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US391124A
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David A Cutler
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Triangle Publications Inc
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Triangle Publications Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders

Definitions

  • This invention relates to printing cylinders of the type used in rotogravure printing and has for an object the provision of a non-metallic sleeve assembly for protecting the ends of the printing cylinder from corrosion by chrome and copper plating electrolytes, engraving and etchants and for preventing printing ink buildup on the ends of the printing cylinders and on the shafts of the printing cylinders.
  • the printing surface of the cylinder shall be smooth and shall be round or cylindrical within extremely narrow limits.
  • smoothness that is, a highly polished surface, and also the accuracy within which the diameter is maintained
  • copper has been plated directly on the ferrous cylinder, thereafter brought to needed final dimensions, and subsequently used for rotogravure printing.
  • the impressions on the cylinder have been removed by grinding and the surface again polished preparatory to the development thereon of a new material to be utilized in the rotogravure printing.
  • Additional copper has been plated onto the cylinder as needed. It has also been proposed to strip the copper shell from the cylinder and to produce a new shell by electroplating.
  • a sleeve of non-metallic acid-, electrolyteand ink-resisting material preferably in close-setting relationship with the shaft extensions and terminating in an outwardly extending flange portion having an outturned end which is held in a peripheral groove of the cylinder in manner to form an impervious seal.
  • FIG. 1 is a side view partly in section of a printing cylinder for rotogravure process
  • FIG. 2 is a partial end view of the cylinder of FIG. 1.
  • FIG. 1 there is shown a cylinder 10, preferably hollow and supported by shaft extension at the respective ends.
  • shaft extension 11 is shown.
  • the shaft is suitably supported in bearings, generally indicated at 12.
  • the bearings 12 support the cylinder while it is in an electroplating bath, while it is in use in rotogravure printing, and while it is in a grinding machine in which an outer layer 13, such as copper, may be in part or in whole removed.
  • the inks utilized in rotogravure printing have relatively low surface tension and otherwise creep and dry on other than the printing surfaces. They are particularly bothersome in building up layer-s on the ends of the cylinders and along the supporting shafts, thus presenting contaminate problems in respect to the electrolyte and staining problems in the handling of printing cylinders.
  • the ends of the cylinders and the shaft extensions also are subject to attack by the electrolyte which is quite corrosive.
  • a sleeve 14 made of a synthetic resin, such as polytetrafluoroethylene, generally available on the market under the trademark Teflon, extends over the exposed portion of each shaft extension.
  • the cylindrical portion of the sleeve 14 is clamped to the shaft extension by a stainless steel slinger ring 15 provided with an overhanging lip 15a.
  • the ring 15 may be constructed of Teflon. The ring 15 when elevated in temperature expands and is slipped into place over the reduced portion 11a of the shaft extension until it abuts against a shoulder 11b of the shaft extension.
  • the ring is cooled to bring the overhanging lip 15a tightly against the end of the sleeve 14 and also to produce a shrink-fit to the shaft extension 11.
  • a leakproof seal between the Teflon sleeve 14 and the shaft extension.
  • the Teflon sleeve 14 may also be heated first and shrink-fitted to the exposed portion of each shaft extension so as to provide a more positive seal.
  • the sleeve 14 is fairly thick, i.e., about A", and terminates in the curved region between the end of the cylinder and its shaft extension.
  • the sleeve further includes a flat flange portion 14b having a conical section 14a.
  • the conical section 14a is adhesively secured to cylindrical portion of sleeve 14 in the curved region 110.
  • the flange portion 14b also has a cylindrical extension 14c parallel to the axis of the cylinder and nesting within a peripheral groove 10a of cylinder 10.
  • the cylindrical extension 14c is tightly clamped in place by a locking ring 16.
  • the locking ring may have a slight taper to increase the leakproof seal it provides for the end face of cylinder 10 which is to be protected.
  • the sleeve assembly as a whole may be made in one piece through the arrangement providing the thicker sleeve portion 14 to which there is adhesively attached a conical thinner portion 14a is satisfactory.
  • Teflon has been found highly satisfactory in providing the needed protection for the ends of the cylinder and the shaft extensions because of its chemical inertness in respect to the electrolyte or plating baths as well as its ability to resist wetting by an accumulation thereon of printing inks, it is to be understood that other synthetic resins or plastic materials may be utilized as long as they are chemically inert to both the electrolyte baths and printing inks.
  • synthetic resins such as polytetrafluoroethylene, available under trade name of Teflon; polychlorotrifluoroethylene, KEL-F; FEP .fluorocarbons; and vinyl chloride and vinyl chlorideacetate can be used within the scope of the present invention.
  • the electrolyte baths themselves are well known to those skilled in the art of plating and can be any of the kind used for adding to or removing from the surface of the cylinder 10 copper or other metals which are sometimes used at the surface of the printing cylinder such as nickel and the like.
  • the peripheral recess 10a is located adjacent the opposite rounded corners of the printing cylinder and the ring 16 itself is of a material which at its exposed face may receive a coating of copper during the electroplating of the copper layer 13 on the face of the cylinder.
  • the copper layer extends over the cylindrical surface of the cylinder 10 down around the corners thereof and itself forms an electroplating seal with the locking ring 16 down to and into butting relation with the inturned cylindrical portion of the flange of the protecting sleeve.
  • Locking ring 16 may also be made of synthetic resins, similar to those already described, so as to further provide a more consistent noncorrosive assembly a well as a more leakproof seal.
  • a protective sleeve of a material inert to electroplating baths, printing inks, and etching solutions said sleeve having:
  • a locking ring disposed in tight-fitting relationship against said cylindrical extension and against the other opposed wall in said peripheral recess to secure said cylindrical extension within said recess to form a leakproof seal
  • a slinger ring having an overhanging lip clamping said cylindrical portion tightly to said shaft to form a leakproof seal.
  • said slinger ring includes a rounded outer periphery, said slinger ring being disposed in shrink-fit relationship on said shaft, said cylindrical portion being disposed under said oglerhanging lip to clamp said cylindrical portion to said 5 aft.

Description

1366- 1966 D. A. CUTLER PROTECTIVE SLEEVE Filed Aug. 21, 1964 United States Patent 3,292,535 PROTECTIVE SLEEVE David A. Cutler, Philadelphia, Pa., assignmto Triangle Publications, Inc., Philadelphia, Pa., a corporation of Delaware Filed Aug. 21, 1964, Ser. No. 391,124 7 Claims. (Cl. 101375) This invention relates to printing cylinders of the type used in rotogravure printing and has for an object the provision of a non-metallic sleeve assembly for protecting the ends of the printing cylinder from corrosion by chrome and copper plating electrolytes, engraving and etchants and for preventing printing ink buildup on the ends of the printing cylinders and on the shafts of the printing cylinders.
As will be understood by those skilled in the art, it is of utmost importance that the printing surface of the cylinder shall be smooth and shall be round or cylindrical within extremely narrow limits. To achieve at low cost the needed accuracies regarding smoothness,that is, a highly polished surface, and also the accuracy within which the diameter is maintained, resort has been had to the utilization of copper shells plated directly on a relatively heavy cylindrical body, generally of a ferrous metal. Ultimately, copper has been plated directly on the ferrous cylinder, thereafter brought to needed final dimensions, and subsequently used for rotogravure printing. In some instances, the impressions on the cylinder have been removed by grinding and the surface again polished preparatory to the development thereon of a new material to be utilized in the rotogravure printing. Additional copper has been plated onto the cylinder as needed. It has also been proposed to strip the copper shell from the cylinder and to produce a new shell by electroplating.
It is the purpose of the present invention to prevent inks used in rotogravure printing from adhering to the cylinder ends and shaft extensions and to provide protection against the corrosive character of the electrolyte used in the plating and etching operations.
In carrying out the invention in one form thereof, there is provided a sleeve of non-metallic acid-, electrolyteand ink-resisting material preferably in close-setting relationship with the shaft extensions and terminating in an outwardly extending flange portion having an outturned end which is held in a peripheral groove of the cylinder in manner to form an impervious seal. For further objects and advantages of the invention, reference is to be had to the accompanying drawing in which:
FIG. 1 is a side view partly in section of a printing cylinder for rotogravure process; and
' FIG. 2 is a partial end view of the cylinder of FIG. 1.
Referring to FIG. 1, there is shown a cylinder 10, preferably hollow and supported by shaft extension at the respective ends. One of these, shaft extension 11, is shown. The shaft is suitably supported in bearings, generally indicated at 12. The bearings 12 support the cylinder while it is in an electroplating bath, while it is in use in rotogravure printing, and while it is in a grinding machine in which an outer layer 13, such as copper, may be in part or in whole removed.
The inks utilized in rotogravure printing have relatively low surface tension and otherwise creep and dry on other than the printing surfaces. They are particularly bothersome in building up layer-s on the ends of the cylinders and along the supporting shafts, thus presenting contaminate problems in respect to the electrolyte and staining problems in the handling of printing cylinders. The ends of the cylinders and the shaft extensions also are subject to attack by the electrolyte which is quite corrosive.
In accordance with the present invention, a sleeve 14 made of a synthetic resin, such as polytetrafluoroethylene, generally available on the market under the trademark Teflon, extends over the exposed portion of each shaft extension. The cylindrical portion of the sleeve 14 is clamped to the shaft extension by a stainless steel slinger ring 15 provided with an overhanging lip 15a. Alternately, the ring 15 may be constructed of Teflon. The ring 15 when elevated in temperature expands and is slipped into place over the reduced portion 11a of the shaft extension until it abuts against a shoulder 11b of the shaft extension. The ring is cooled to bring the overhanging lip 15a tightly against the end of the sleeve 14 and also to produce a shrink-fit to the shaft extension 11. Thus, there is provided a leakproof seal between the Teflon sleeve 14 and the shaft extension.
The Teflon sleeve 14 may also be heated first and shrink-fitted to the exposed portion of each shaft extension so as to provide a more positive seal.
The sleeve 14 is fairly thick, i.e., about A", and terminates in the curved region between the end of the cylinder and its shaft extension. In order to protect the end of the cylinder, the sleeve further includes a flat flange portion 14b having a conical section 14a. The conical section 14a is adhesively secured to cylindrical portion of sleeve 14 in the curved region 110. The flange portion 14b also has a cylindrical extension 14c parallel to the axis of the cylinder and nesting within a peripheral groove 10a of cylinder 10. The cylindrical extension 14c is tightly clamped in place by a locking ring 16. The locking ring may have a slight taper to increase the leakproof seal it provides for the end face of cylinder 10 which is to be protected.
It is understood, of course, that the sleeve assembly as a whole may be made in one piece through the arrangement providing the thicker sleeve portion 14 to which there is adhesively attached a conical thinner portion 14a is satisfactory.
Though Teflon has been found highly satisfactory in providing the needed protection for the ends of the cylinder and the shaft extensions because of its chemical inertness in respect to the electrolyte or plating baths as well as its ability to resist wetting by an accumulation thereon of printing inks, it is to be understood that other synthetic resins or plastic materials may be utilized as long as they are chemically inert to both the electrolyte baths and printing inks. For example, synthetic resins such as polytetrafluoroethylene, available under trade name of Teflon; polychlorotrifluoroethylene, KEL-F; FEP .fluorocarbons; and vinyl chloride and vinyl chlorideacetate can be used within the scope of the present invention.
The electrolyte baths themselves are well known to those skilled in the art of plating and can be any of the kind used for adding to or removing from the surface of the cylinder 10 copper or other metals which are sometimes used at the surface of the printing cylinder such as nickel and the like.
Further in accordance with the invention, the peripheral recess 10a is located adjacent the opposite rounded corners of the printing cylinder and the ring 16 itself is of a material which at its exposed face may receive a coating of copper during the electroplating of the copper layer 13 on the face of the cylinder. In this manner, the copper layer extends over the cylindrical surface of the cylinder 10 down around the corners thereof and itself forms an electroplating seal with the locking ring 16 down to and into butting relation with the inturned cylindrical portion of the flange of the protecting sleeve.
Locking ring 16 may also be made of synthetic resins, similar to those already described, so as to further provide a more consistent noncorrosive assembly a well as a more leakproof seal.
While there has been described a typical and preferred embodiment of the invention, it is, of course, to be understood'that changes may be made within the spirit and scope of the appended claims.
What is claimed is:
1. The combination comprising a printing cylinder hava cylindrical printing surface and an end face,
a shaft extending from said end face of said cylinder for rotatably supporting said cylinder, and
a peripheral recess in said end face having two opposed Walls,
a protective sleeve of a material inert to electroplating baths, printing inks, and etching solutions, said sleeve having:
a cylindrical portion disposed in close fitting relationship on said shaft and extending from said end face along an exposed portion of said shaft,
a flange portion covering said end face, and
a cylindrical extension extending from the periphery of said flange portion, said cylindrical extension being disposed against one opposed Wall in said peripheral recess,
a locking ring disposed in tight-fitting relationship against said cylindrical extension and against the other opposed wall in said peripheral recess to secure said cylindrical extension within said recess to form a leakproof seal, and
a slinger ring having an overhanging lip clamping said cylindrical portion tightly to said shaft to form a leakproof seal.
2. The combination of claim 1 in which said cylindrical portion and flange portion consist of a synthetic resin selected from the group consisting of polytetrafluoroethylene and polychlorotrifluoroethylene.
3. The combination of claim 1 in which the cylindrical portion of said sleeve has a thickness greater than said flange portion.
4. The combination of claim 3 in which said flange portion has a conical section adhesively secured to and forming an extension of said cylindrical portion.
5. The combination of claim 1 in which said locking ring has an exposed surface, and in which said printing surface is electroplated with an extension of the electroplated surface covering said exposed surface to form an electroplated seal overlying said ring.
6. The combination of claim 1 in which said locking ring and said slinger ring consist of a synthetic resin selected from the group consisting of polytetrafluoroethylene and polychlorotrifiuoroethylene.
7. The combination recited in claim 1 wherein said slinger ring includes a rounded outer periphery, said slinger ring being disposed in shrink-fit relationship on said shaft, said cylindrical portion being disposed under said oglerhanging lip to clamp said cylindrical portion to said 5 aft.
References Cited by the Examiner UNITED STATES PATENTS 850,317 4/1907 Ridgely 29-119 1,801,396 4/1931 Thatcher 29123 X 1,83 1,645 11/193 1 Ballard 10140l 2,625,735 1/1953 Hitov. 2,650,603 9/ 1953 Howes 134-122. 2,918,069 12/1959 Brown et al 29 1 19 X 2,925,088 2/ 1960 Roscoe 29-132 X 2,948,773 8/1960 Hawes. 3,067,056 12/ 1962 Remer 101364 X FOREIGN PATENTS 189,147 4/ 1906 Germany. 531,155 12/1940 Great Britain.
References Cited by the Applicant UNITED STATES PATENTS 1,498,180 6/ 1924 Linder. 1,708,084 4/ 1929 Doane. 1,831,645 11/1931 Ballard. 2,029,011 1/ 1936 Bart. 2,127,824 8/ 193 8 Leuchter. 2,356,007 8/ 1944 Sanders. 2,435,872 2/ 1948 Coulson. 2,608,982 9/ 1952 Zademach et al. 2,650,603 9/ 195 3 Howes. 2,676,599 4/ 1954 McHenry. 2,726,492 12/ 1955 Vegell. 2,734,778 2/ 1956 Cook. 2,776,256 1/ 1957 Eulner et al. 2,817,562 12/1957 Fleming et al. 2,852,450 9/ 1958 Mundell. 2,989,966 6/ 1961 Marshall.
FOREIGN PATENTS 267,91 1 9/ 1927 Great Britain.
OTHER REFERENCES Rotogravure, A Survey of European and American Methods, by H. M. Cartwright, F.R.P.S. and Robert Mac- Kay, MacKay Publishing Company, Inc., Lyndon, Ky.
ROBERT E. PULFREY, Primary Examiner.
I- I H ant Exam ne

Claims (1)

1. THE COMBINATION COMPRISING A PRINTING CYLINDER HAVING: A CYLINDRICAL PRINTING SURFACE AND AN END FACE, A SHAFT EXTENDING FROM SAID END FACE OF SAID CYLINDER FOR ROTATABLY SUPPORTING SAID CYLINDER, AND A PERIPHERAL RECESS IN SAID END FACE HAVING TWO OPPOSED WALLS, A PROTECTIVE SLEEVE OF A MATERIAL INERT TO ELECTROPLATING BATHS, PRINTING INKS, AND ETCHING SOLUTIONS, SAID SLEEVE HAVING: A CYLINDRICAL PORTION DISPOSED IN CLOSE FITTING RELATIONSHIP ON SAID SHAFT AND EXTENDING FROM SAID END FACE ALONG AN EXPOSED PORTION OF SAID SHAFT, A FLANGE PORTION COVERING SAID END FACE, AND A CYLINDRICAL EXTENSION EXTENDING FROM THE PERIPHERY OF SAID FLANGE PORTION, SAID CYLINDRICAL EXTENSION BEING DISPOSED AGAINST ONE OPPOSED WALL IN SAID PERIPHERAL RECESS, A LOCKING RING DISPOSED IN TIGHT-FITTING RELATIONSHIP AGAINST SAID CYLINDRICAL EXTENSION AND AGAINST THE OTHER OPPOSED WALL IN SAID PERIPHERAL RECESS TO SECURE SAID CYLINDRICAL EXTENSION WITHIN SAID RECESS TO FORM A LEAKPROOF SEAL, AND A SLINGER RING HAVING AN OVERHANGING LIP CLAMPING SAID CYLINDRICAL PORTION TIGHTLY TO SAID SHAFT TO FORM A LEAKPROOF SEAL.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4621919A (en) * 1983-07-13 1986-11-11 Canon Kabushiki Kaisha Metal drum and image holding member using the same
US6477952B1 (en) * 1998-03-30 2002-11-12 I. Mar Planning, Inc. Ink feed roller for printers
US10056310B2 (en) 2016-09-26 2018-08-21 International Business Machines Corporation Electrolytic seal

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US1498180A (en) * 1921-07-09 1924-06-17 Ideal Roller & Mfg Co Roller
GB267911A (en) * 1926-03-19 1927-09-15 Ernest S Ballard Improvements in printing forms and method of producing same
US1708084A (en) * 1927-04-15 1929-04-09 Miller Co Stencil and process of making the same
US1801396A (en) * 1926-09-24 1931-04-21 Underwood Elliott Fisher Co Typewriting machine
US1831645A (en) * 1927-09-28 1931-11-10 Ballard Process Co Printing form and method of making same
US2029011A (en) * 1931-02-02 1936-01-28 Bart Blasius Seamless tank
US2127824A (en) * 1928-04-17 1938-08-23 August A Leuchter Printing member for intaglio or rotary photogravure printing
GB531155A (en) * 1939-07-13 1940-12-30 Charles Henry Budd Improvements in and connected with damping rollers for printing
US2356007A (en) * 1942-07-30 1944-08-15 Wingfoot Corp Acid-resistant roll
US2435872A (en) * 1943-12-23 1948-02-10 Coulson Silas Method of electroplating cylinders
US2608982A (en) * 1943-10-05 1952-09-02 Metalwash Machinery Co Shaft bearing seal
US2625735A (en) * 1948-12-07 1953-01-20 Resistoflex Corp End seal for printing rollers
US2650603A (en) * 1947-06-28 1953-09-01 Goodrich Co B F Roll assembly for continuous strip pickling tanks
US2676599A (en) * 1952-01-26 1954-04-27 Allegheny Ludlum Steel System for pickling
US2726492A (en) * 1950-12-19 1955-12-13 Standard Process Corp Grinding and polishing head
US2734778A (en) * 1956-02-14 Reinforced tire supporting member
US2776256A (en) * 1953-03-19 1957-01-01 Kurt P A Eulner Process of making intaglio printing cylinders
US2817562A (en) * 1953-07-01 1957-12-24 Gen Motors Corp Coated piston
US2852450A (en) * 1954-06-10 1958-09-16 Donnelley & Sons Co Method of copper plating
US2918069A (en) * 1958-01-15 1959-12-22 Hanson Van Winkle Munning Co Sealing rolls for tanks
US2925088A (en) * 1958-06-23 1960-02-16 Du Pont Apparatus for making regenerated cellulose film
US2948773A (en) * 1955-04-29 1960-08-09 Applied Physics Corp Electrical terminal having insulating bushing
US2989966A (en) * 1957-02-21 1961-06-27 United States Steel Corp Shaft seal
US3067056A (en) * 1959-10-15 1962-12-04 Robert K Remer Improvements in printing with ink composition having volatile solvents

Patent Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE189147C (en) *
US2734778A (en) * 1956-02-14 Reinforced tire supporting member
US850317A (en) * 1906-09-24 1907-04-16 Standard Trimmer Company Paper-hanger's smoothing-roller.
US1498180A (en) * 1921-07-09 1924-06-17 Ideal Roller & Mfg Co Roller
GB267911A (en) * 1926-03-19 1927-09-15 Ernest S Ballard Improvements in printing forms and method of producing same
US1801396A (en) * 1926-09-24 1931-04-21 Underwood Elliott Fisher Co Typewriting machine
US1708084A (en) * 1927-04-15 1929-04-09 Miller Co Stencil and process of making the same
US1831645A (en) * 1927-09-28 1931-11-10 Ballard Process Co Printing form and method of making same
US2127824A (en) * 1928-04-17 1938-08-23 August A Leuchter Printing member for intaglio or rotary photogravure printing
US2029011A (en) * 1931-02-02 1936-01-28 Bart Blasius Seamless tank
GB531155A (en) * 1939-07-13 1940-12-30 Charles Henry Budd Improvements in and connected with damping rollers for printing
US2356007A (en) * 1942-07-30 1944-08-15 Wingfoot Corp Acid-resistant roll
US2608982A (en) * 1943-10-05 1952-09-02 Metalwash Machinery Co Shaft bearing seal
US2435872A (en) * 1943-12-23 1948-02-10 Coulson Silas Method of electroplating cylinders
US2650603A (en) * 1947-06-28 1953-09-01 Goodrich Co B F Roll assembly for continuous strip pickling tanks
US2625735A (en) * 1948-12-07 1953-01-20 Resistoflex Corp End seal for printing rollers
US2726492A (en) * 1950-12-19 1955-12-13 Standard Process Corp Grinding and polishing head
US2676599A (en) * 1952-01-26 1954-04-27 Allegheny Ludlum Steel System for pickling
US2776256A (en) * 1953-03-19 1957-01-01 Kurt P A Eulner Process of making intaglio printing cylinders
US2817562A (en) * 1953-07-01 1957-12-24 Gen Motors Corp Coated piston
US2852450A (en) * 1954-06-10 1958-09-16 Donnelley & Sons Co Method of copper plating
US2948773A (en) * 1955-04-29 1960-08-09 Applied Physics Corp Electrical terminal having insulating bushing
US2989966A (en) * 1957-02-21 1961-06-27 United States Steel Corp Shaft seal
US2918069A (en) * 1958-01-15 1959-12-22 Hanson Van Winkle Munning Co Sealing rolls for tanks
US2925088A (en) * 1958-06-23 1960-02-16 Du Pont Apparatus for making regenerated cellulose film
US3067056A (en) * 1959-10-15 1962-12-04 Robert K Remer Improvements in printing with ink composition having volatile solvents

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4621919A (en) * 1983-07-13 1986-11-11 Canon Kabushiki Kaisha Metal drum and image holding member using the same
US6477952B1 (en) * 1998-03-30 2002-11-12 I. Mar Planning, Inc. Ink feed roller for printers
US10056310B2 (en) 2016-09-26 2018-08-21 International Business Machines Corporation Electrolytic seal

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