EP0042595B1 - Farbrolle und Verfahren zur Herstellung derselben - Google Patents

Farbrolle und Verfahren zur Herstellung derselben Download PDF

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Publication number
EP0042595B1
EP0042595B1 EP81104707A EP81104707A EP0042595B1 EP 0042595 B1 EP0042595 B1 EP 0042595B1 EP 81104707 A EP81104707 A EP 81104707A EP 81104707 A EP81104707 A EP 81104707A EP 0042595 B1 EP0042595 B1 EP 0042595B1
Authority
EP
European Patent Office
Prior art keywords
tube
core
grooves
ridges
ink
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
Application number
EP81104707A
Other languages
English (en)
French (fr)
Other versions
EP0042595A1 (de
Inventor
Paul Helmut Hamisch, Jr.
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.)
Avery Dennison Retail Information Services LLC
Original Assignee
Monarch Marking Systems Inc
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 Monarch Marking Systems Inc filed Critical Monarch Marking Systems Inc
Publication of EP0042595A1 publication Critical patent/EP0042595A1/de
Application granted granted Critical
Publication of EP0042595B1 publication Critical patent/EP0042595B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/26—Construction of inking rollers

Definitions

  • the invention relates to an ink roller for a printer, the ink roller comprising: a tube composed of moldable plastics material and provided with a plurality of circumferentially and axially spaced holes and having end portions closable to provide interior space adapted to receive a supply of ink, porous ink-receptive material received about the tube and a method for making the roller.
  • the invention is based on the object of developing the ink roller of the aforementioned type in such a manner that the holes can be made in a particularly elegant way.
  • the ink roller according to the invention in which this problem is solved is characterized by axially spaced first ridges at the outer periphery of the tube, the first ridges defining intervening first grooves, and axially extending circumferentially spaced second ridges at the inner periphery of the tube, the second ridges defining intervening second grooves, said first grooves and said second grooves defining the holes at the points of intersection.
  • a particularly suitable development consists in that the axially spaced first ridges defining the intervening first grooves are formed by a continuous helical ridge.
  • the embodiment is advantageous in that the mold for manufacturing the ink roller may be a one-piece member, as it can be unscrewed from the molded tubular member like a nut.
  • the invention also relates to a method of making an ink roller, said method being disclosed in claims 3 and 4.
  • the ink roller 10 has a tube generally indicated at 11, porous ink-receptive material in the form of a sleeve 12 received about the tube, a bearing roll 13 formed integrally with the tube 11, a bearing roll 14 coupled to the tube 11, and a pair of identical closures generally indicated at 15 and 16.
  • the sleeve 12 has an elongated through-hole 17 to enable the sleeve 12 to be slid onto the tube 11.
  • the tube 11 has end portions 18 and 19 to which the bearing rolls 13 and 14 are connected.
  • the tube 11 also has a series of ridges or rings 20 which are of the same diameter as end portions 18 and 19.
  • the end portoins 18 and 19 and the ridges 20 are separated from one another by associated intervening grooves 21.
  • Holes 22 extend through the tube 11 at the grooves 21.
  • the holes 22 have straight parallel sides in the plane shown in Figure 2 and straight but converging sides in the plane shown in Figure 3.
  • the holes 22 converge from the inside or in interior space 23 of the tube 11 to the bottoms of grooves 21.
  • the shape of the holes 22 is conductive to the efficient flow of ink (not shown for clarity) from the interior space 24 within the tube 11. It is important that the convergence be from the interior surface 24 outwardly so that essentially all of the last traces of the ink pass to the porous ink-receptive sleeve 12.
  • the bearing roll 14 is best shown in Figure 2 to have an annular axially extending wall portion or tubular portion 25, and an annular radially extending wall portion 27 joining the wall portion or tubular portion 26.
  • the wall portion 25 has a continuous internal annular groove 28 adjacent a shoulder 29.
  • the wall portion 25 also has a continuous internal axially extending groove 30.
  • the outer surface of the wall portion 26 is stepped as indicated at 31.
  • the outer surface of the wall portion 26 also has outwardly extending hook-shaped teeth 32 which engage or couple with holes 33 in the end portion 18.
  • the wall portion 26 is sufficiently resilient to yield slightly as the wall portion 26 is inserted into the end portion 18 of the tube 11.
  • the undersides of the teeth 32 engage or hook the edges of holes 33 as shown in Figure 2 when assembled.
  • the marginal end 34 of the end portion 18 is thinner than the wall thickness of the tube 11 at the ridges 20.
  • the marginal end 34 makes a snug liquid-tight seal with the stepped or enlarged portion 31 of the wall portion 26. Due to the thinness of the marginal end 34, it accommodates readily to the outer surface of the enlarged portion 31.
  • the marginal end 34 terminates short of the wall portion 27.
  • the closure 15 has an end wall 35. Extending outwardly in one direction from the end wall 35 is a support generally indicated at 36 and a continuous flange or tubular wall portion 37. Extending outwardly in the opposite direction from the end wall 35 is an annular shaft 38.
  • the support 36 is shown to include a plurality, specifically four, radially extending, thin support members or vanes 39 disposed in close proximity to the inner surface of the wall portion 26 adjacent the teeth 32.
  • the four support members 39 are shown in line with four of the eight teeth 32.
  • the support members 32 prevent the wall 26 from flexing, and thus uncoupling or disengagement of the teeth 32 from the holes 33 is obviated.
  • the four support mebmers 39 are always lined up with four teeth 32 because they fit into four grooves 40.
  • the terminal end 37a of the wall portion 37 fits into the groove 30 to provide a liquid-tight seal.
  • the wall portion 37 also makes a liquid-tight seal with the inner surface of the wall portion 25.
  • the end wall 35 also includes a continuous annular projection or ridge 41 which makes a snap-fit connection in the groove 28.
  • the ridge 41 acting in groove 28 also makes a liquid-tight seal with the groove 28.
  • the end wall 35 abuts the end face of shoulder 29.
  • closures 15 and 16 are designate by different general reference characters, the individual portions thereof are designated with the same reference characters.
  • the support 39 of the closure 16 serves no useful purpose becaues the bearing roll 13 is formed integrally with end portion 19 and hence cannot separate.
  • FIG. 4 there is shown a fragment of a mold 42 for making the tube and bearing roll 13.
  • the mold 42 cooperates with a core 43 having a hole 44 for receiving end portion 45 of a core 46.
  • the core 43 makes the inside of the bearing roll 13 and the core 46 makes the inside of the tube 11.
  • the core 46 has external flutes 47 which are shown to be straight and tapered.
  • the inside of the mold 42 has a plurality of spaced ridges 48 providing an annular surface.
  • the ridges 48 define intervening grooves 48a that provide an annular surface also.
  • the outer surfaces 49 of the flutes 47 have the same radius as the surfaces of the ridges 48.
  • the outer surfaces 49 make a liquid-tight seal with the inner surfaces of the ridges 48 so that during molding the moldable plastics material 50 does not flow there.
  • the places where the outer surfaces 49 of the core 46 contact the inner surfaces of the ridges 48 of the mold 42 form outlets of the holes 22 into grooves 21.
  • the sides of the flutes converge as shown so that the sides of the resultant holes 22 converge as shown, for example, in Figure 3.
  • Following molding the cores 43 and 46 are moved apart and the tube 11 and its bearing roll 13 are removed.
  • the flutes 47 make straight axially extending grooves 11 a and intervening ridges 23a on the inside of the tube 11.
  • the grooves communicate with the holes 22.
  • the material 50 of which the tube 11 and its bearing roll 13 are composed is moldable plastics material.
  • the bearing roll 14 and the closures 15 and 16 are also molded of plastics material. This material is sufficiently flexible and resilient to enable the component parts to snap together.
  • the grooves 21 can be a continuous helical groove. In that event the ridges 48 are required to be helical.
  • the end portion 19 of the tube 11 can be made identical to the end portion 18 and the bearing roll 13 can be made identical to the bearing roll 14.
  • the support 36 of the closure 16 would serve the same function as the support 36 of the closure 15.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Claims (4)

1. Farbwalze für einen Drucker, wobei die Farbwalze umfaßt: ein Rohr (11), das aus einem gießfähigen Kunststoff besteht und mit Zahlreichen Löchern (22) versehen ist, die in Umfangsrichtung und in Axialrichtung im gegenseitigen Abstand voneinander angeordnet sind, und das verschließbare Endbereiche aufweist, un einen inneren Hohlraum zur Aufnahme eines Farbvorrates zu bilden, und mit einem das Rohr (11) umgebenden porösen farbaufnehmenden Material (12), gekennzeichnet durch am Außenumfang des Rohres (11) im axialen Abstand voneinander angeordnete erste Rippen (20), wobei die ersten Rippen (20) dazwischenliegende erste Nuten (21) begrenzen, und am Innenumfang des Rohres in Umfangsrichtung im Abstand voneinander angeordnete axial verlaufende zweite Rippen (23a), wobei die zweiten Rippen dazwischenliegende zweite Nuten (1 1 a) begrenzen, wobei die ersten Nuten (21) und die zweiten Nuten (11 a) in den Schnittpunkten die Löcher (22) begrenzen.
2. Farbwalze nach Anspruch 1, dadurch gekennzeichnet, daß die in axialen Abstand voneinander angeordneten ersten Rippen, welche die dazwischenliegenden ersten Nuten begrenzen, von einer fortlaufenden schraubenlinienförmigen Rippe gebildet sind.
3. Verfahren zum Herstellen einer Farbwalze, bestehend aus folgenden Verfahrensschritten: Schaffen eines ringförmigen Formhohlraums, der am Innenumfang Rippen und dazwischenliegende Nuten aufweist, Schaffen eines Kerns (46), der zahlreiche Stege (47) aufweist, wobei der Außendurchmesser des Kerns an den Stegen der gleiche ist wie der Innendurchmesser des Formhohlraums an den Rippen, Einsetzen des Kerns in den Formhohlraum, um eine flüssigkeitsdichte Abdichtung gegen ein Fließen des gießfähigen Kunststoffes zu schaffen, wo sich die Rippen und die Stege schneiden, Füllen des Hohlraumes zwischen der Form und dem Kern mit gießfähigem Kunststoff, Beseitigen des Rohres von dem Formhohlraum und dem Kern, Anordnen einer rohrförmigen, porösen, farbaufnehmenden Hülse über dem Rohr, Einbringen von Farbe in den Innerraum des Rohres und Verschließen der Endbereiche des Rohres.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Stege geradlinig sind und daß das Beseitigen des Rohres vom Formhohlraum und dem Kern ein geradliniges Auseinanderbewegen des Kerns und des gegossenen Rohres umfaßt.
EP81104707A 1980-06-23 1981-06-19 Farbrolle und Verfahren zur Herstellung derselben Expired EP0042595B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16181380A 1980-06-23 1980-06-23
US161813 1988-02-29

Publications (2)

Publication Number Publication Date
EP0042595A1 EP0042595A1 (de) 1981-12-30
EP0042595B1 true EP0042595B1 (de) 1984-08-15

Family

ID=22582856

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104707A Expired EP0042595B1 (de) 1980-06-23 1981-06-19 Farbrolle und Verfahren zur Herstellung derselben

Country Status (6)

Country Link
EP (1) EP0042595B1 (de)
JP (1) JPS5725989A (de)
AU (1) AU551669B2 (de)
CA (1) CA1171318A (de)
DE (1) DE3165554D1 (de)
ZA (1) ZA813883B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4452141A (en) * 1982-02-17 1984-06-05 Monarch Marking Systems, Inc. Fountain-type porous roller with central bearing flange
CA1299441C (en) * 1987-09-30 1992-04-28 Robert Beaver Self metering gravity fed ink dispensing roll
US5577444A (en) * 1993-06-22 1996-11-26 Yamahachi Chemical Co., Ltd. Hand stamp
US5906161A (en) * 1997-12-10 1999-05-25 Monarch Marking Systems, Inc. Ink roller assembly

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1020829A (fr) * 1949-05-13 1953-02-11 Gu Nther Wagner Procédé et dispositif pour l'application uniforme de liquides sur des objets de toute espèce
CH393375A (de) * 1962-05-25 1965-06-15 Hasler Ag Einfärbvorrichtung für Druck- und Stempelmaschinen

Also Published As

Publication number Publication date
AU7197081A (en) 1982-01-07
DE3165554D1 (en) 1984-09-20
ZA813883B (en) 1982-06-30
CA1171318A (en) 1984-07-24
JPH0152191B2 (de) 1989-11-08
JPS5725989A (en) 1982-02-10
EP0042595A1 (de) 1981-12-30
AU551669B2 (en) 1986-05-08

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