EP0491802A1 - Printing roll core. - Google Patents

Printing roll core.

Info

Publication number
EP0491802A1
EP0491802A1 EP90913908A EP90913908A EP0491802A1 EP 0491802 A1 EP0491802 A1 EP 0491802A1 EP 90913908 A EP90913908 A EP 90913908A EP 90913908 A EP90913908 A EP 90913908A EP 0491802 A1 EP0491802 A1 EP 0491802A1
Authority
EP
European Patent Office
Prior art keywords
core
sleeve
passages
compressed air
valve
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.)
Granted
Application number
EP90913908A
Other languages
German (de)
French (fr)
Other versions
EP0491802B1 (en
Inventor
Rolf S Persson
Per-Olof Janson
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.)
MILLER GRAPHICS AB
Original Assignee
MILLER GRAPHICS AB
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 MILLER GRAPHICS AB filed Critical MILLER GRAPHICS AB
Publication of EP0491802A1 publication Critical patent/EP0491802A1/en
Application granted granted Critical
Publication of EP0491802B1 publication Critical patent/EP0491802B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
    • B41F27/105—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders for attaching cylindrical printing formes

Definitions

  • a printing roll core for a printing roll comprising such a core and one or more sleeves which are provided to be mounted on the core from one end thereof and to be displaced along the core to and from working positions on the core by causing compressed air to flow out through passages terminating in outlets distributed along the outer surface of the core, so that the sleeve from a state in which the sleeve tightly fits the core, when compressed air is not caused to flow through said outlets, may be expanded by causing air to flow through said outlets, so that the sleeve may be displaced along the core.
  • Printing roll cores of the above mentioned type are known since long and are extensively used within the graphic industry. For example may be mentioned those printing roll core designs which are described in US-A-3 146 709 and G-A-l 581 232.
  • a drawback of these known printing roll cores is that compressed air is flowing out through all the outlets in the surface of the core when the sleeve is being mounted on the core or is being removed from it.
  • this known system shall function it has therefore been necessary to concentrate the majority of the outlets to a region of the surface of the core adjacent to that end of the core where the mounting operation is initiated, while only one single outlet is located at the central part of the surface of the core.
  • the purpose of the invention is to provide an improved printing roll core, in which the above mentioned drawbacks and limitations have been eliminated in a simple way.
  • Fig. 1 is a longitudinal sectional view through a printing roll core according to the invention
  • Fig. 1A shows an encircled detail of Fig. 1 at a larger scale
  • Fig. 2 shows the same printing roll core as in Fig. 1 with a sleeve partly mounted on the core;
  • Fig. 3 shows a printing roll core with a plurality of sleeves mounted side by side on the core.
  • a printing roll core has been generally designated 1. It consists according to the embodiment of a cylindrical shell 2 (also a slightly tapered core may be conceived) and two end portions 3 and 4 provided with axle bars 5 and 6.
  • the cylindrical outer surface of the shell 2 has been designated 7.
  • Compressed air can be supplied from a source of compressed air through a compressed air hose 9 via a connection nozzle 8 in axle bar 5.
  • hose 9 there may optionally be provided a valve for opening and closing the connection.
  • the supply of compressed air may be effected either by opening the valve 10 or by connecting the mouth piece 11 of hose 9 to the connection nozzle 8 of the axle bar 5. When closing the supply the operation is reverse.
  • a fill body 12 of rigid cellular plastic material which reduces the air volume in the interior of the core to the thin gaps between on one side the shell 2 and the end portions 3 and 4, and on the other side the said fill body 12.
  • valve 14 is a ball valve of well known type, as is shown in Fig. 1A.
  • valve seat 15 having an outer annular border line which essentially coincides with the outer surface 7 of the shell.
  • a steel ball 17 is pressed towards the seat 15 by means of a spring 18. In the closing position of the valve the ball 17 extends beyond the outmost part of the valve seat 15 and also beyond the outer surface of the shell 2 by an outer portion 19 which has the shape of a spherical calotte.
  • the sleeve - or the sleeves - which shall be mounted on the printing roll core 1 may be designed in a manner per se and consist of an inner shell 20 of reinforced plastics and an outer tube 21 of rubber with an exterior cliche.
  • the sleeve has been generally designated 22, Fig. 2.
  • the compressed air hose 9 is connected to the nozzle 8, and the valve 10 is opened so that the interior of the core is subjected to an overpressure. No air, however, can flow through the passages 13a-13h as the valves 14 are closed.
  • the sleeve 22 is mounted, starting in the right hand portion of the core 2, which portion in this case is the initial mounting end.
  • the end portion 23 therefore suitably is somewhat tapered in order to facilitate the initial mechanical mounting operation.
  • the sleeve 22 will with its interior side press the balls 17 of the valves 14 into the passages 13a under compression of spring 18.
  • the valves are opened in a manner known per se and air flows out through the outlets of these first passages 13a such that the sleeve 22 will be expanded to a sufficient degree in order that it readily may be further moved over the core 2.
  • the other valves 14, i.e. the valves in passages 13b-13h are still closed but they will successively be opened as they are covered by the sleeve 22 during the continued movement of the sleeve along the core 2.
  • Fig. 3 illustrates the case when a plurality of sleeves 22a, 22b, 22c, and 22d are mounted on a core 1. This may be made without problems according to the invention as the shell 2 of the core 1 may be pro ⁇ vided with a plurality of valve provided passages 13a-13h. These has been indicated in Fig. 1 only by an X. It is also possible according to the invention to provide only one or a couple of comparatively short sleeves on a comparatively long core 1, so that the sleeves only will cover a minor portion of the core, a possibility which sometimes is worthwhile.

Landscapes

  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Ink Jet (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Winding Of Webs (AREA)

Abstract

A printing roll core for a printing roll comprising such a core (1) and a sleeve (22) which is provided to be mounted on the core from one end thereof and to be displaced along the core to and from working positions on the core by causing compressed air to flow out through passages (13a-13h) terminating in outlets distributed along the outer surface of the core, so that the sleeve from a state in which the sleeve tightly fits the core, when compressed air is not caused to flow through said outlets, may be expanded by causing air to flow through said outlets, so that the sleeve may be displaced along the core. The passages may be connected to a source of compressed air which preferably are common for said passages. In each of said passages is provided a valve (14) and each such valve includes an opening member (17, 19) having an outer portion (19) extending beyond the outer surface (7) of the exterior portion (2) of the core when the valve is closed and said outer portion is in its outer position, said outer portion being displaceable through outer mechanical action from said outer position to an inner position essentially interior of or coinciding with the outer surface of the core, wherein the valve is opened such that compressed air may flow out through the opening in the surface of the core, said mechanical action being performed by the sleeve as said sleeve is being mounted on the core, wherein the valves are successively opened as the sleeve is brought into contact with their outer portions and are closed again when the sleeve has passed the opening in question.

Description

PRINTING ROLL CORE
TECHNICAL FIELD This invention relates to a printing roll core for a printing roll comprising such a core and one or more sleeves which are provided to be mounted on the core from one end thereof and to be displaced along the core to and from working positions on the core by causing compressed air to flow out through passages terminating in outlets distributed along the outer surface of the core, so that the sleeve from a state in which the sleeve tightly fits the core, when compressed air is not caused to flow through said outlets, may be expanded by causing air to flow through said outlets, so that the sleeve may be displaced along the core.
BACKGROUND OF THE INVENTION
Printing roll cores of the above mentioned type are known since long and are extensively used within the graphic industry. For example may be mentioned those printing roll core designs which are described in US-A-3 146 709 and G-A-l 581 232. A drawback of these known printing roll cores is that compressed air is flowing out through all the outlets in the surface of the core when the sleeve is being mounted on the core or is being removed from it. In order that this known system shall function it has therefore been necessary to concentrate the majority of the outlets to a region of the surface of the core adjacent to that end of the core where the mounting operation is initiated, while only one single outlet is located at the central part of the surface of the core. The reason for this that the sleeve already initially shall be caused to cover the majority of the outlets through which compressed air is caused to flow out since the fall of pressure otherwise would be so large that the sleeve would not be able to be sufficiently expanded. This compromise, however, means that a plurality of sleeves cannot be mounted side by side on one and the same core, which is a serious limitation since it is often desirable to make a plurality of printings side by side in one and the same printing unit. Another drawback is that a sleeve which by mistake has been displaced so far along the core that it has passed the central outlet will be locked on the core without any possibility to be released.
BRIEF DISCLOSURE OF THE INVENTION
The purpose of the invention is to provide an improved printing roll core, in which the above mentioned drawbacks and limitations have been eliminated in a simple way. These and other objectives may be achieved therein that the invention is characterized by what is stated in the appending claims.
Further characteristic features, aspects and advantages of the inven¬ tion will be apparent from the following description of a preferred embodiment.
BRIEF DESCRIPTION OF DRAWINGS
In the following description of a preferred embodiment reference will be made to the accompanying drawings, in which
Fig. 1 is a longitudinal sectional view through a printing roll core according to the invention;
Fig. 1A shows an encircled detail of Fig. 1 at a larger scale;
Fig. 2 shows the same printing roll core as in Fig. 1 with a sleeve partly mounted on the core; and
Fig. 3 shows a printing roll core with a plurality of sleeves mounted side by side on the core.
DESCRIPTION OF PREFERRED EMBODIMENT
A printing roll core has been generally designated 1. It consists according to the embodiment of a cylindrical shell 2 (also a slightly tapered core may be conceived) and two end portions 3 and 4 provided with axle bars 5 and 6. The cylindrical outer surface of the shell 2 has been designated 7. Compressed air can be supplied from a source of compressed air through a compressed air hose 9 via a connection nozzle 8 in axle bar 5. In hose 9 there may optionally be provided a valve for opening and closing the connection. The supply of compressed air may be effected either by opening the valve 10 or by connecting the mouth piece 11 of hose 9 to the connection nozzle 8 of the axle bar 5. When closing the supply the operation is reverse. In the interior of the printing roll core 1 is a fill body 12 of rigid cellular plastic material which reduces the air volume in the interior of the core to the thin gaps between on one side the shell 2 and the end portions 3 and 4, and on the other side the said fill body 12.
In the shell 2 there are in a manner known per se provided a number of passages 13a, 13b ... 13h. In each such passage is a nonreturn valve 14. More particularly the valve 14 is a ball valve of well known type, as is shown in Fig. 1A. In the passage 13a there is provided a valve seat 15 having an outer annular border line which essentially coincides with the outer surface 7 of the shell. A steel ball 17 is pressed towards the seat 15 by means of a spring 18. In the closing position of the valve the ball 17 extends beyond the outmost part of the valve seat 15 and also beyond the outer surface of the shell 2 by an outer portion 19 which has the shape of a spherical calotte.
The sleeve - or the sleeves - which shall be mounted on the printing roll core 1 may be designed in a manner per se and consist of an inner shell 20 of reinforced plastics and an outer tube 21 of rubber with an exterior cliche. The sleeve has been generally designated 22, Fig. 2. When the sleeve 22 shall be mounted on the core 2 the compressed air hose 9 is connected to the nozzle 8, and the valve 10 is opened so that the interior of the core is subjected to an overpressure. No air, however, can flow through the passages 13a-13h as the valves 14 are closed. The sleeve 22 is mounted, starting in the right hand portion of the core 2, which portion in this case is the initial mounting end. The end portion 23 therefore suitably is somewhat tapered in order to facilitate the initial mechanical mounting operation. When the sleeve 22 thus has been mounted so far that it has passed the tapered portion 23, the sleeve 22 will with its interior side press the balls 17 of the valves 14 into the passages 13a under compression of spring 18. Herein the valves are opened in a manner known per se and air flows out through the outlets of these first passages 13a such that the sleeve 22 will be expanded to a sufficient degree in order that it readily may be further moved over the core 2. The other valves 14, i.e. the valves in passages 13b-13h, are still closed but they will successively be opened as they are covered by the sleeve 22 during the continued movement of the sleeve along the core 2.
Fig. 3 illustrates the case when a plurality of sleeves 22a, 22b, 22c, and 22d are mounted on a core 1. This may be made without problems according to the invention as the shell 2 of the core 1 may be pro¬ vided with a plurality of valve provided passages 13a-13h. These has been indicated in Fig. 1 only by an X. It is also possible according to the invention to provide only one or a couple of comparatively short sleeves on a comparatively long core 1, so that the sleeves only will cover a minor portion of the core, a possibility which sometimes is worthwhile.

Claims

1. Printing roll core for a printing roll comprising such a core (1) and a sleeve (22) which is provided to be mounted on the core from one end thereof and to be displaced along the core to and from working positions on the core by causing compressed air to flow out through passages (13a-13h) terminating in outlets distributed along the outer surface of the core, so that the sleeve from a state in which the sleeve tightly fits the core, when compressed air is not caused to flow through said outlets, may be expanded by causing air to flow through said outlets, so that the sleeve may be displaced along the core, c h a r a c t e r i z e d in that said passages may be connected to a source of compressed air, which preferably is common for said passages, that a valve (14) is provided in each of said passages, and that each such valve includes an opening member (17, 19) having an outer portion (19) extending beyond the outer surface (7) of the exterior portion (2) of the core when the valve is closed and said outer portion is in its outer position, said outer portion being displaceable through outer mechanical action from said outer position to an inner position essentially interior of or coinciding with the outer surface of the core, wherein the valve is opened such that compressed air may flow out through the opening in the surface of the core, said mechanical action being performed by the sleeve as said sleeve is being mounted on the core, wherein the valves are successively opened as the sleeve is brought into contact with their outer portions and are closed again when the sleeve has passed the opening in question.
2. Printing roll core according to claim 1, c h a r a c t e r i z e d in that the valves consist of ball valves, said outer portion con- sisting of a portion of the ball.
3. Printing roll core according to claim 1, c h a r a c t e r i z e d in that in the interior of the core there is provided a fill body (12) which reduces the air volume of the core to a space between on one side the shell and the two end portions (3, 4) of the core and on the other side said fill body (12).
EP90913908A 1989-09-13 1990-09-06 Printing roll core Expired - Lifetime EP0491802B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE8903004 1989-09-13
SE8903004A SE466190B (en) 1989-09-13 1989-09-13 TRYCKVALSKAERNA
PCT/SE1990/000568 WO1991004155A1 (en) 1989-09-13 1990-09-06 Printing roll core

Publications (2)

Publication Number Publication Date
EP0491802A1 true EP0491802A1 (en) 1992-07-01
EP0491802B1 EP0491802B1 (en) 1995-01-11

Family

ID=20376863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90913908A Expired - Lifetime EP0491802B1 (en) 1989-09-13 1990-09-06 Printing roll core

Country Status (6)

Country Link
EP (1) EP0491802B1 (en)
AT (1) ATE116903T1 (en)
AU (1) AU6410990A (en)
DE (1) DE69016034T2 (en)
SE (1) SE466190B (en)
WO (1) WO1991004155A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000070145A1 (en) * 1999-05-12 2000-11-23 Arjo Wiggins Fine Papers Limited Texturing roller in a paper machine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9101235L (en) * 1991-04-23 1992-10-24 Miller Graphics Ab DEVICE FOR PRINTING
US7107907B2 (en) 2001-01-22 2006-09-19 Goss International Americas, Inc. Flow-restricted printing cylinder for a removable printing sleeve
DE10306196B3 (en) * 2003-02-13 2004-10-07 Windmöller & Hölscher Kg Ink transfer roller
DE102008022635A1 (en) * 2008-05-08 2009-11-12 Manroland Ag Web Press
DE102009023170B4 (en) * 2009-05-29 2013-09-05 Wetzel Gmbh Sleeve and method for mounting such on a support roller
BE1027278B1 (en) * 2019-05-15 2020-12-15 Hannecard Nv ROLL CORE AND APPLICATOR ROLL WITH INTERCHANGEABLE ROLLER SHELL

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE403454B (en) * 1977-05-26 1978-08-21 Tetra Pak Int DEVICE FOR MIXING CLICHES ON A PRESSURE ROLLER BY VACUUM
SE436717B (en) * 1980-11-04 1985-01-21 Olov Orjan Johnsson A roller with exchangeable outer casing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9104155A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000070145A1 (en) * 1999-05-12 2000-11-23 Arjo Wiggins Fine Papers Limited Texturing roller in a paper machine

Also Published As

Publication number Publication date
SE466190B (en) 1992-01-13
DE69016034D1 (en) 1995-02-23
SE8903004L (en) 1991-03-14
SE8903004D0 (en) 1989-09-13
DE69016034T2 (en) 1995-06-01
WO1991004155A1 (en) 1991-04-04
AU6410990A (en) 1991-04-18
ATE116903T1 (en) 1995-01-15
EP0491802B1 (en) 1995-01-11

Similar Documents

Publication Publication Date Title
EP0510744B1 (en) Apparatus relating to a printing unit
US5960815A (en) Air nozzle of inflating device
EP0058559B1 (en) Improved valve
DE3115269C2 (en) Seat with an inflatable expandable sack arranged in a seat section
DE3644742C2 (en)
CA2010534A1 (en) Wire Line Core Drilling Apparatus
EP0491802B1 (en) Printing roll core
DE4343205A1 (en) Safety valve for artificial respirator
WO1999000099A3 (en) Bariatric bed
US4015624A (en) Tire valve
DE69212768T2 (en) de-icer
CH644560A5 (en) DEVICE FOR SUPPLYING A DIVER WITH BREATHING AIR AND FOR CHANGING THE FLOATING NEEDED.
DE69004525T2 (en) Kickback safety device.
DE3310052C1 (en) Tire pressure control system
US20020162467A1 (en) Flow-restricted printing cylinder for a removable printing sleeve
US4473195A (en) Pneumatic, expandible shaft with keys
DE69814028T2 (en) Device for filling and blowing off tubes from tires
DE102004044744A1 (en) Ink tank for automatic registration, writing and drawing positions
DE3877915T2 (en) AUTOMATIC INLET VALVE.
DE19744389A1 (en) Valve with pressure medium inlet and outlet chambers connectable together by inlet valve
US3040970A (en) Dual aspirating apparatus
DE1133251B (en) Compressed gas breathing apparatus with a retraction signal device
DE29821537U1 (en) Air valve
WO2003037779A8 (en) Filling valve with fluid muscle valve activator
DE59501054D1 (en) Combination fitting for connecting a safety valve, quick breather and pressure gauge

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19920325

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL

17Q First examination report despatched

Effective date: 19931014

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19950111

Ref country code: LI

Effective date: 19950111

Ref country code: FR

Effective date: 19950111

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19950111

Ref country code: DK

Effective date: 19950111

Ref country code: CH

Effective date: 19950111

Ref country code: BE

Effective date: 19950111

Ref country code: AT

Effective date: 19950111

REF Corresponds to:

Ref document number: 116903

Country of ref document: AT

Date of ref document: 19950115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69016034

Country of ref document: DE

Date of ref document: 19950223

ITF It: translation for a ep patent filed

Owner name: ORGANIZZAZIONE D'AGOSTINI

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19950930

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030903

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030918

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040906

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040906

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050906