EP0743180A2 - Couronne d'extrémité en aluminium, coulée sous pression et non usinée, pour un pochoir cylindrique - Google Patents

Couronne d'extrémité en aluminium, coulée sous pression et non usinée, pour un pochoir cylindrique Download PDF

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Publication number
EP0743180A2
EP0743180A2 EP96830264A EP96830264A EP0743180A2 EP 0743180 A2 EP0743180 A2 EP 0743180A2 EP 96830264 A EP96830264 A EP 96830264A EP 96830264 A EP96830264 A EP 96830264A EP 0743180 A2 EP0743180 A2 EP 0743180A2
Authority
EP
European Patent Office
Prior art keywords
ring
fabric printing
ring nut
die
nuts
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.)
Withdrawn
Application number
EP96830264A
Other languages
German (de)
English (en)
Other versions
EP0743180A3 (fr
Inventor
Fausto Bernasconi
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.)
EREDI DI BERNASCONI FAUSTO
Original Assignee
EREDI DI BERNASCONI FAUSTO
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 EREDI DI BERNASCONI FAUSTO filed Critical EREDI DI BERNASCONI FAUSTO
Publication of EP0743180A2 publication Critical patent/EP0743180A2/fr
Publication of EP0743180A3 publication Critical patent/EP0743180A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/34—Screens, Frames; Holders therefor
    • B41F15/38—Screens, Frames; Holders therefor curved

Definitions

  • the present invention relates to an improved ring nut arrangement for fabric printing cylinders.
  • the fabric printing cylinders usually comprise a thin nickel sheet element, supported at the end portions thereof, by ring nut or metal ring elements, made of aluminum or aluminium alloys.
  • the ring nuts are conventionally made by casting and, successively, they are mechanically machined in order to provide attachment elements for engagement with the rotary printing machine, the cylindric surface being provided with grooves or ribs for a tight connection of the cylinder.
  • the cylinder is connected to the ring nuts by high strength glue materials, and the tightness of the coupling must be absolutely perfect.
  • a main drawback of the prior ring nuts for the above mentioned application is that, since the aluminium is an elastic or resilient metal, as the ring nuts are mechanically machined, it is not possible to obtain a perfectly cylindrical surface, and frequently an "ovalized" surface is obtained.
  • the tolerances of mechanically machined ring nuts are usually of the order to 10-15/100 mm.
  • the aim of the present invention is to provide a ring nut having a perfectly cylindrical ribbed or grooved surface, allowing the printing cylinder to be easily adjusted to a very accurate tolerance.
  • a main object of the present invention is to provide a ring-nut for the above mentioned application which can be made more economically and quicker than prior ring nuts.
  • a ring nut for supporting a cylinder for printing fabric materials characterized in that said ring nut is directly made by a die-casting process, in an already ribbed configuration, without the need of performing subsequent mechanical machining operations.
  • the ring nut according to the present invention which has been generally indicated by the reference number 1, comprises a cylindric portion 2, connected to an end piece 3 by a tapering portion 4.
  • the end piece 3 comprises ridges 5 for connection to the driving elements of the fabric printing apparatus, in a per se known manner.
  • the surface of the cylindric portion 2 is provided for supporting a fabric printing cylinder 6, schematically shown in figure 6, and comprises a flat portion 7 and a cylindric portion 2.
  • ribs are preferably formed on one or two circumferential portions 9, and are specifically designed for facilitating the glueing operation of the cylinder 6.
  • the ring nut 1 according to the present invention is made by a die-casting process, so as to allow conventional mechanical machining operations to be eliminated.
  • the die-cast ring nut according to the present invention is already provided with ribs and has a surface roughness allowing the conventionally used adhesive materials to provide a firm gripping.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP96830264A 1995-05-17 1996-05-08 Couronne d'extrémité en aluminium, coulée sous pression et non usinée, pour un pochoir cylindrique Withdrawn EP0743180A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI951003A IT1274520B (it) 1995-05-17 1995-05-17 Ghiere in alluminio per cilindri per la stampa di tessuti,ottenute direttamente per pressofusione,senza alcuna lavorazione
ITMI951003 1995-05-17

Publications (2)

Publication Number Publication Date
EP0743180A2 true EP0743180A2 (fr) 1996-11-20
EP0743180A3 EP0743180A3 (fr) 1996-11-27

Family

ID=11371618

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96830264A Withdrawn EP0743180A3 (fr) 1995-05-17 1996-05-08 Couronne d'extrémité en aluminium, coulée sous pression et non usinée, pour un pochoir cylindrique

Country Status (2)

Country Link
EP (1) EP0743180A3 (fr)
IT (1) IT1274520B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2607013A3 (fr) * 2011-12-22 2017-05-03 MAGNA BDW technolgies GmbH Procédé de fabrication de composants cylindriques
CN109789698A (zh) * 2016-09-26 2019-05-21 小森公司 印刷品的清漆膜厚测定方法和清漆膜厚测定装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858507A (en) * 1973-04-09 1975-01-07 Cranston Print Works Co Cylindrical stencil with plastic end rings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2607013A3 (fr) * 2011-12-22 2017-05-03 MAGNA BDW technolgies GmbH Procédé de fabrication de composants cylindriques
CN109789698A (zh) * 2016-09-26 2019-05-21 小森公司 印刷品的清漆膜厚测定方法和清漆膜厚测定装置

Also Published As

Publication number Publication date
ITMI951003A1 (it) 1996-11-17
IT1274520B (it) 1997-07-17
EP0743180A3 (fr) 1996-11-27
ITMI951003A0 (it) 1995-05-17

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