US2278512A - Apparatus for obtaining etchable deposits on printing cylinders - Google Patents

Apparatus for obtaining etchable deposits on printing cylinders Download PDF

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Publication number
US2278512A
US2278512A US191760A US19176038A US2278512A US 2278512 A US2278512 A US 2278512A US 191760 A US191760 A US 191760A US 19176038 A US19176038 A US 19176038A US 2278512 A US2278512 A US 2278512A
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US
United States
Prior art keywords
roller
base
axis
etchable
deposits
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
US191760A
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English (en)
Inventor
Egli Arnold August
Bokenkamp Carl
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.)
Langbein Pfanhauser Werke AG
Original Assignee
Langbein Pfanhauser Werke AG
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 Langbein Pfanhauser Werke AG filed Critical Langbein Pfanhauser Werke AG
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Publication of US2278512A publication Critical patent/US2278512A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/16—Curved printing plates, especially cylinders
    • B41N1/20—Curved printing plates, especially cylinders made of metal or similar inorganic compounds, e.g. plasma coated ceramics, carbides
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/22—Electroplating combined with mechanical treatment during the deposition
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/60—Electroplating characterised by the structure or texture of the layers
    • C25D5/605—Surface topography of the layers, e.g. rough, dendritic or nodular layers
    • C25D5/611—Smooth layers

Definitions

  • deposited metal is obtained by the smooth work pieces.
  • a polishing action or the obtainment of a completely smooth homogeneous surface as is necessary e. g. for etchable'printing cylinders cannot be achieved.
  • In order to make the copper surfaces of the cylinders etchable these must always be submitted to a special polishing process.
  • a free rolling, as frictionless as possible, is adorded and any slipping, drawing or pushing of the agate roller on the cylinder surface is avoided.
  • the roller is increasingly loaded during the electroplating.
  • any grinding or polishing is superfluous which is of special advantage in printing cylinders of which the surface layer serving foretching is only so strong that it suffices for the time being for one etching and after the finish or printing is removed as a copper skin or turned down. Further characteristios of the process and the ap paratus serving to carry it out are given by the vfollowing 'description of one example of carrying the invention into effect.
  • Figure i is a perpendicular section through a galvanic bath and shows an apparatus formed according to the invention in two positions.
  • Figure 2 is a plan view of Figure v1 in which the weight carrying arm isbroken away.
  • Figure 3 shows'.a..smoothing roller with its holder in .elevationv Figure 4 is aside view, an
  • FIG 5 -a front view of Figure 3.
  • the anode holders 2 with the anodes 3 while the cylinder to be coppered 4, dips partly into the bath as cathode and is rotated -in the direction of the arrow 1).
  • the screw shaft 5 is regulably driven turns alternately to the right and left. correspondingly the slide 6 carried by the shaft 5 is slowly moved to and fro with the nuts l.
  • the speed of rotation of the cylinder 4 and the displacement of the slide on the spindle 5 are preferably so correlated that with one-revolution of the cylinderthe sideways displacement of the smoothing roller will amount to about a third of the width of the path of contact of the roller with the cylinder, so that in traveling a helical path over the surface of the cylinder the edges of the path of contact will overlap.
  • a double bearing 9 of the arm 8 is a bolt II to take up the pierced
  • al weight plates I2 rotatable spindle I3 which is displaceable in the axial direction and may be held by the collars I4 in order to be able continuously to adjust the smoothing roller.i6 to be vertically above the cylinder 4. So that the axis of the spindle I3 serving for adjustment may form a tangent as far as possible to the smoothing roller I6 4the bearing fork I5 is correspondingly bent. Thereby a tilting movement produced by the feeding forward of the spindle is avoided.
  • the displacement of the slide 6 causes the roller I6 to roll in a screw-line on the cylinder. If the axis of the roller were to be, as in the known processes, parallel to the axis of the cylinder, it would have an angle to its lineV of mor tion and the roller could not roll without slipping. By the movability in all directions of the roller provided according ,to the invention this adjusts itself however automatically in the very direction of its rolling, and also even for. the change of direction at the two ends of the cylindex', and also for cylinders of different diameter. Larger cylinders produce merely for the same displacement of the slide 6 a smaller angle of inclination than small cylinders.
  • the shaft I3 is capable of rocking about the bolt lI0 of the double bearing 9.
  • the roller IB must be capable of automatic adjustment on the cylinder so that especia-ily on reversal, slipping is avoided.
  • the diameter of the roller decreases from that of the cylindrical middle part about 3 cm.. wide, towards both side faces in a curve, as is obvious from Figures 3 to 5.
  • the stationary stones I9 which act on both ends of the cylinder, serve to prevent blister formation at the edges of the cylinder and to smooth these edges.
  • the agate roller is allowed to roll without additional pressure on the cylinder surface. After about one third of the time necessary to form an etchable layer has passed the roller is loaded by adding weights of about 10 kg. About half an hour before the ending of the coppering the current density is reduced by half.
  • the current is switched on for a short time in the reversed direction in order that to the axis of and above said base so as to roll uniformly over the deposit on said base, means attaching said roller to said slide so as to be freely bodily shiftable with respect to said slide during reciprocation thereof about an axis perpendicular to the common tangential plane of the base and roller and spaced from the point of tangency, whereby said roller can freely Aroll over said base in reversed helical paths without sliding as the result of the rotation of said base and the reciprocation of said slide.
  • An electroplating apparatus including a rotating cylindrical base, a roller having a cylindrical central portion terminating in curved end portions of gradually decreasing diameter journalled for free rotation about an axis parallel to considerably higher loaded roller (20-30 kg.).
  • An electroplating apparatus including a roa sponge I8 bath liquid is supplied directly be-v drical' base so as to roll over the deposit as it is plated thereon, a slide, means to reciprocate said slide endwise of said base, and mechanism connecting said roller to said slide, said mechanism including a first pivoted connection having its axis substantially perpendicular to the common tangential plane of the base and roller and substantially spaced from the point of tangency, and a second pivoted connection having its axis lying substantially parallel to said common tangential plane, substantially'intersecting the axis of said first pivoted connection, and substantially lperpendicular to the axis of said roller.
  • roller comprises a cylindrical central portion terminating in end portions of smaller diameter curving slightly inwardly Ifrom said central portion towards theends of the roller.
  • An apparatus for producing etchable deposits upon a rotating cylindrical base comprising an idle roller journalled above said base for rotation about an axis substantially parallel to the axis of the base so as to roll over and exert pressure on the deposit as it is plated thereon, said roller having a cylindrical center portion and gradually tapered ends, means to permit variation of the pressure exerted by said roller, and mechanism movable parallel to the length of the cylinder to pull said roller freely over said base on helical paths without relative sliding of the roller with respect to the base, including a pivotal mounting for said roller rotatable about an axis substantially perpendicular to the common tangential plane of the roller and cylinder and spaced from the point of tangency.
  • An apparatus for producing etchable deposits upon a rotating cylindrical base comprising means to smooth the end edges of the deposit upon said base, an idle roller journalled above said base for rotation about an axis substantially parallel to that of the base so as to roll over ⁇ said base and exert pressure on the deposit between said edges as it is plated thereon and mechanism to move said roller freely over said base in helical paths from end to end without relative sliding of the roller with respect to the base, including means permitting pivotal movement of the roller about an axis substantially perpendicular to the common tangential plane of the roller and base and spaced from the point of tangency.
  • An apparatus for electroplating deposits upon a cylindrical base rotating about a horizontal axis comprising a slide and mechanism to reciprocate said slide to and fro in a direction parallel to the axis of said base, an idle roller journalled on an axis substantially parallel to the axis of the base for rolling on said cylindrical. base, and means plvotally attaching said roller to said slide so as to swing freely about an axis substantially perpendicular to the common tangential plane of. the roller and cylindrical base and substantially spaced from the point of tangency, whereby said roller will track upon said base without sliding.
  • An apparatus for electroplating deposits upon a base having a continuous surface rotating about a horizontal axis. comprising a slide and means to reciprocate said slide to and fro along tating cylindrical base, an idle roller journalled 4 above .said cylindrical base for rotation about an axis substantially parallel to that of the cylina line parallel to the surface of the base, an idle roller journalled on an axis substantially parallel to the axis of the base, for rolling on said surface, kmeans p ermjtting movement of said roller away from theaxis of the cylinder, and lmeans pivotally attaching said roller to said slide so as to swing freely about an axis substantially perpendicular to the common tangential plane of the roller and surface and spaced from the point of tangency, whereby said roller will track upon said surface without sliding.
  • An apparatus for electroplating deposits upon a base having a continuous surface rotating about a horizontal axis comprising a slide and means to reciprocate said slide to and fro along a line parallel to the surface of said base; a substan# tially horizontally journalled idle roller riding on said surface; a connection pivotally attaching said rollergto ⁇ said slide so as to swing freely about an axis substantially spaced from the point of tangency and substantially perpendicular to the common tangential plane of the roller and surface; said connection including means permitting said roller to pivot aboutlanlaxis lying substantially in said tangential plane and perpendicular to the roller axis.
  • An apparatus for producing etchable deposits upon a rotating cylindricalbase comprisng al roller J'ournalled above said base for free rotation about an axis substantially parallel to the axis of said base so as to roll over and exert pressure on the deposit as it is plated thereon, mechanism movable parallel to the length of the base, and means connecting said mechanism and roller to pull said roller freely over the base on helical paths without relative sliding of the roller with respect to the base, including a connection pivotable about an axis substantially perpendicular to the common tangential plane of the roller and base and spaced from the point of tangency.
  • roller comprises a cylindrical central portion terminating in end portions of smaller diameter curving slightly inwardly from said central portion towards the ends of the roller1 Y ARNOLD AUGUST EGLI. CARL BImNKAMP.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
US191760A 1937-02-22 1938-02-21 Apparatus for obtaining etchable deposits on printing cylinders Expired - Lifetime US2278512A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH499241X 1937-02-22

Publications (1)

Publication Number Publication Date
US2278512A true US2278512A (en) 1942-04-07

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ID=4516860

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Application Number Title Priority Date Filing Date
US191760A Expired - Lifetime US2278512A (en) 1937-02-22 1938-02-21 Apparatus for obtaining etchable deposits on printing cylinders

Country Status (5)

Country Link
US (1) US2278512A (sh)
BE (1) BE426526A (sh)
FR (1) FR834056A (sh)
GB (1) GB499241A (sh)
NL (1) NL49427C (sh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156632A (en) * 1960-02-11 1964-11-10 Horst Corp Of America V D Method of applying particles to an electrofoam during electroplating

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2473290A (en) * 1944-10-21 1949-06-14 George E Millard Apparatus for plating journals of crankshafts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156632A (en) * 1960-02-11 1964-11-10 Horst Corp Of America V D Method of applying particles to an electrofoam during electroplating

Also Published As

Publication number Publication date
NL49427C (sh)
BE426526A (sh)
FR834056A (fr) 1938-11-10
GB499241A (en) 1939-01-20

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