EP0132246B1 - Printing unit - Google Patents
Printing unit Download PDFInfo
- Publication number
- EP0132246B1 EP0132246B1 EP84850226A EP84850226A EP0132246B1 EP 0132246 B1 EP0132246 B1 EP 0132246B1 EP 84850226 A EP84850226 A EP 84850226A EP 84850226 A EP84850226 A EP 84850226A EP 0132246 B1 EP0132246 B1 EP 0132246B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- machine frame
- cylinder
- bearing brackets
- printing
- printing unit
- 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
Links
Images
Classifications
-
- 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
- B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
- B41F13/34—Cylinder lifting or adjusting devices
- B41F13/36—Cams, eccentrics, wedges, or the like
Definitions
- the present invention relates to a printing unit mounted on a machine frame and comprising a back pressure cylinder, a printing cylinder adjustably spaced from said back pressure cylinder, and an inking roller included in an inking device and adjustably spaced from said printing cylinder, said printing cylinder and said inking roller being mounted in bearing brackets resting upon an arm on the machine frame and urgeable, by interposition of exchangeable gauge blocks, into pressure contact with a machine frame surface and the printing cylinder bearing brackets, respectively, by means of a power unit.
- DE Patent 27 46 878 where the pressure contact is established during operation of the printing unit by means of a cylinder assembly hingedly connected to the machine frame arm and actuating a lever which, in its turn, is pivotally mounted in said arm and hingedly connected to a guide.
- the guide can be clamped by means of a clamping device to a bar connected to the rear ends of the bearing brackets of the inking roller.
- the printing unit which is disclosed in FR-A-2,271,931 and in which use is made of a chain for tensioning purposes.
- the chain has one of its contact points located in the region of the machine frame surface of the printing unit whereas the other contact point is located on the bearing bracket of the inking device.
- the chain is single acting.
- the contact pressure exerted by the power unit has its contact points in the machine frame within the region of the machine frame surface, wherein the power unit is formed of at least one elongate member which is adjustably clamped at one end in the machine frame, which is connected at its other end to a power device, and which is passed between its ends around the bearing brackets, wherein the power device is mounted in the machine frame, and wherein the elongate member is passed around the bearing brackets via supporting guide means.
- the elongate member is a chain which is passed around the bearing brackets via guide means mounted on the bearing bracket of the inking roller.
- the chain is double acting and exerts a much larger force than the chain disclosed in the above- mentioned French document.
- a back pressure cylinder 1 is rotatably mounted in a machine frame 2 which has an arm 3 carrying bearing brackets 4 for a printing cylinder 5 rotatably mounted in said bearing brackets 4. Further bearing brackets 6 are mounted on the machine frame arm 3 to carry the inking device of the printing unit.
- the printing unit comprises an inking roller 7 cooperating with the printing cylinder 5 and engaging, in its turn, a fountain roller which dips into an ink container 9.
- the fountain roller 8 is mounted in the bearing brackets 6 by means of swivel arms 28.
- the web of material 10 travels between the back pressure cylinder 1 and the printing cylinder 5.
- the machine frame 2 has a frame surface 11 against which the bearing brackets 4 of the printing cylinder can be urged by interposition of gauge blocks 12 corresponding to the diameters of the cylinders 1 and 5, said bearing brackets 4 being displaceably carried on the machine frame arm 3.
- the bearing brackets 6 of the inking roller 7, on their part, can be urged against the bearing brackets 4 by interposition of gauge blocks 13 corresponding to the diameters of the printing cylinder 5 and the inking roller 7, said bearing brackets 6 also being displaceably carried on the arm 3.
- each chain 15 is adjustably clamped at one end in the machine frame 2 by means of a self-locking eccentric lock 16.
- the other end of each chain 15 is connected to one arm of a lever 17 pivotally mounted in the machine frame 2 and having its other arm hingedly connected to the piston rod of a pneumatic or hydraulic cylinder 18, the cylinder end of which is hingedly connected to the machine frame 2.
- each chain 15 is passed around the bearing brackets 4 and 6 via upper and lower guide pulleys 19 and 20 rotatably mounted on the bearing brackets 6 of the inking roller 7.
- the lower guide pulley 20 is mounted in an eccentric bush 21 which can be rotated to permit adjustable tensioning of the associated chain 15.
- the chain 15 is tensioned via the lever 17 around the guide pulleys 19 and 20.
- the contact pressure exerted by the cylinder 18 has its contact points in the machine frame 2 within the region of the frame surface 11, such that the arm 3 is entirely relieved of the contact pressure, and the bearing brackets 4 and 6 will be entirely independent of any support by the arm 3.
- the nominal spacings between the rollers and the cylinders 1, 5 and 7 can be set exactly by means of the gauge blocks 12 and 13 in combination with the contact pressure of the bearing brackets 4 and 6 against one another and against the machine frame surface 11.
- the printing cylinder 5 and the inking roller 7 are mounted in eccentric bushes 22 and 23 connected each to one lever 24 and 25.
- the free ends of said levers 24 and 25 are hingedly connected to adjusting devices 26 and 27 with micrometer screws for precise adjustment.
- a further advantage of the printing unit according to the invention is that its printing cylinder can be readily exchanged for another printing cylinder of different diameter.
- the eccentric lock 16 is unlocked by means of a suitable tool, whereupon the chain 15 is slackened by the required amount.
- the return movement made possible by the cylinder stroke can be adjusted by means of the eccentrically mounted guide pulley 20.
- the so-called minus stroke of the cylinder 18 is set, via the guide pulley 20, to maximum value.
- the eccentric lock 16 is opened.
- the adjusting device 26 is removed from the machine frame 2, and the bearing brackets 4 and 6 can then be pulled back. If then also the adjusting device 27 is removed, the printing cylinder 5 with its bearing brackets 6 sits loosely on the machine frame arm 3 and can easily be dismounted. If the roller or cylinder diameter is changed, different gauge blocks must be mounted. After that, the bearing brackets are again moved together until the inherent springiness of the bearing brackets 4 begins to resist.
- the eccentric lock 16 is locked and the cylinder 18 is moved in the opposite direction. Also the eccentrically mounted guide pulley 20 is turned to tension the chain 15. Using this guide pulley 20 to limit the stroke of the cylinder 18 is expedient in order to ensure that the spring force in the released position of the printing cylinder 5, when the machine is inoperative, can keep the bearing brackets 4 in position.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Ink Jet (AREA)
- Rotary Presses (AREA)
Abstract
Description
- The present invention relates to a printing unit mounted on a machine frame and comprising a back pressure cylinder, a printing cylinder adjustably spaced from said back pressure cylinder, and an inking roller included in an inking device and adjustably spaced from said printing cylinder, said printing cylinder and said inking roller being mounted in bearing brackets resting upon an arm on the machine frame and urgeable, by interposition of exchangeable gauge blocks, into pressure contact with a machine frame surface and the printing cylinder bearing brackets, respectively, by means of a power unit.
- One such printing unit is disclosed in DE
Patent 27 46 878 where the pressure contact is established during operation of the printing unit by means of a cylinder assembly hingedly connected to the machine frame arm and actuating a lever which, in its turn, is pivotally mounted in said arm and hingedly connected to a guide. The guide can be clamped by means of a clamping device to a bar connected to the rear ends of the bearing brackets of the inking roller. - When the cylinder assembly via the said transfer elements exerts its contact pressure against the bearing brackets of the inking roller, the machine frame arm is subjected to a flexural torque, as a result of which the arm must be dimensioned with due regard to this torque and therefore will be unnecessarily heavy and expensive. Furthermore, there is the risk that the said flexural torque may cause canting of the bearing brackets resting on the machine frame arm, such that the contact pressure against the machine frame surface and the printing cylinder bearing brackets, respectively, will be unevenly distributed, whereby the spacing between on the one hand the printing cylinder and the back pressure cylinder and, on the other hand, the inking roller and the printing cylinder may be difficult to maintain.
- As a further example of the background technique on which the present invention is based, mention should be made of the printing unit which is disclosed in FR-A-2,271,931 and in which use is made of a chain for tensioning purposes. The chain has one of its contact points located in the region of the machine frame surface of the printing unit whereas the other contact point is located on the bearing bracket of the inking device. Thus, the chain is single acting.
- It is the object of this invention to design the printing units referred to above in such a manner that the machine frame arm is not affected by the contact pressure but is entirely relieved of this pressure, and that the bearing brackets will be entirely independent of any support from the machine frame arm.
- According to the invention, this object is achieved in that the contact pressure exerted by the power unit has its contact points in the machine frame within the region of the machine frame surface, wherein the power unit is formed of at least one elongate member which is adjustably clamped at one end in the machine frame, which is connected at its other end to a power device, and which is passed between its ends around the bearing brackets, wherein the power device is mounted in the machine frame, and wherein the elongate member is passed around the bearing brackets via supporting guide means.
- According to a preferred embodiment, the elongate member is a chain which is passed around the bearing brackets via guide means mounted on the bearing bracket of the inking roller. Thus, the chain is double acting and exerts a much larger force than the chain disclosed in the above- mentioned French document.
- Further features of the invention are stated in the accompanying claims.
- The invention will be described in more detail below, reference being had to the accompanying drawing which is a schematic and lateral view of a presently especially preferred embodiment of a printing unit according to the invention.
- A back pressure cylinder 1 is rotatably mounted in a machine frame 2 which has an
arm 3 carryingbearing brackets 4 for aprinting cylinder 5 rotatably mounted in saidbearing brackets 4. Further bearing brackets 6 are mounted on themachine frame arm 3 to carry the inking device of the printing unit. The printing unit comprises aninking roller 7 cooperating with theprinting cylinder 5 and engaging, in its turn, a fountain roller which dips into an ink container 9. The fountain roller 8 is mounted in the bearing brackets 6 by means ofswivel arms 28. The web ofmaterial 10 travels between the back pressure cylinder 1 and theprinting cylinder 5. - The machine frame 2 has a
frame surface 11 against which thebearing brackets 4 of the printing cylinder can be urged by interposition ofgauge blocks 12 corresponding to the diameters of thecylinders 1 and 5, said bearingbrackets 4 being displaceably carried on themachine frame arm 3. The bearing brackets 6 of the inkingroller 7, on their part, can be urged against thebearing brackets 4 by interposition ofgauge blocks 13 corresponding to the diameters of theprinting cylinder 5 and the inkingroller 7, said bearing brackets 6 also being displaceably carried on thearm 3. - During operation of the printing unit, the contact pressure is established by means of a power unit generally designated 14 and consisting in the embodiment illustrated of one or more juxtaposed
chains 15, preferably Fleyer chains. Eachchain 15 is adjustably clamped at one end in the machine frame 2 by means of a self-lockingeccentric lock 16. The other end of eachchain 15 is connected to one arm of alever 17 pivotally mounted in the machine frame 2 and having its other arm hingedly connected to the piston rod of a pneumatic orhydraulic cylinder 18, the cylinder end of which is hingedly connected to the machine frame 2. - Between its ends, each
chain 15 is passed around thebearing brackets 4 and 6 via upper andlower guide pulleys inking roller 7. Thelower guide pulley 20 is mounted in aneccentric bush 21 which can be rotated to permit adjustable tensioning of the associatedchain 15. - Upon activation of the
cylinder 18, thechain 15 is tensioned via thelever 17 around theguide pulleys cylinder 18 and its associatedlever 17 andeccentric lock 16 located in the manner described above and illustrated in the drawing, the contact pressure exerted by thecylinder 18 has its contact points in the machine frame 2 within the region of theframe surface 11, such that thearm 3 is entirely relieved of the contact pressure, and thebearing brackets 4 and 6 will be entirely independent of any support by thearm 3. - The nominal spacings between the rollers and the
cylinders gauge blocks bearing brackets 4 and 6 against one another and against themachine frame surface 11. - Care must also be taken that any deviations from the nominal diameters of the back pressure cylinder 1, the
printing cylinder 5 and the inkingroller 7, as well as any unevenness of the block etc. can be equalised exactly and without play. - To this end, the
printing cylinder 5 and the inkingroller 7 are mounted ineccentric bushes lever levers devices - When the printing unit is inoperative, it suffices to cancel, via the
cylinder 18, the contact pressure of the bearing brackets against theframe surface 11 to such an extent that the inherent springiness of the bearing brackets on the one hand urges thebearing brackets 4 of theprinting cylinder 5 away from theframe surface 11 and thegauge blocks 12, respectively, and on the other hand urges the bearing brackets 6 of the inkingroller 7 and thegauge blocks 13, respectively, away from thebearing brackets 4 of theprinting cylinder 5. In this manner, theprinting cylinder 5 is detached from theweb 10 and from the inkingroller 7. - A further advantage of the printing unit according to the invention is that its printing cylinder can be readily exchanged for another printing cylinder of different diameter. To this end, the
eccentric lock 16 is unlocked by means of a suitable tool, whereupon thechain 15 is slackened by the required amount. - The return movement made possible by the cylinder stroke can be adjusted by means of the eccentrically mounted
guide pulley 20. Upon exchange, the so-called minus stroke of thecylinder 18 is set, via theguide pulley 20, to maximum value. When thecylinder 18 is in the position of the maximum minus stroke, theeccentric lock 16 is opened. The adjustingdevice 26 is removed from the machine frame 2, and thebearing brackets 4 and 6 can then be pulled back. If then also the adjustingdevice 27 is removed, theprinting cylinder 5 with its bearing brackets 6 sits loosely on themachine frame arm 3 and can easily be dismounted. If the roller or cylinder diameter is changed, different gauge blocks must be mounted. After that, the bearing brackets are again moved together until the inherent springiness of thebearing brackets 4 begins to resist. Theeccentric lock 16 is locked and thecylinder 18 is moved in the opposite direction. Also the eccentrically mountedguide pulley 20 is turned to tension thechain 15. Using thisguide pulley 20 to limit the stroke of thecylinder 18 is expedient in order to ensure that the spring force in the released position of theprinting cylinder 5, when the machine is inoperative, can keep thebearing brackets 4 in position. - Naturally, the invention is not restricted to the embodiment described above and illustrated in the drawing, but may be modified in various ways within the scope of the appended claims. For- instance, it is possible to provide, instead of one or
more chains 15, other suitable elongate means, such as ropes, wires etc. Machine elements other than chains etc. may also be used in order to achieve the desired contact pressure of thebearing brackets 4 and 6 against themachine frame surface 11, and furthermore thecylinder 18 may be replaced by some other power unit in order to achieve the desired tension of thechain 15 etc.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84850226T ATE46109T1 (en) | 1983-07-18 | 1984-07-18 | PRINT UNIT. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8304024 | 1983-07-18 | ||
SE8304024A SE454664B (en) | 1983-07-18 | 1983-07-18 | PRESSURE EFFECTS |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0132246A2 EP0132246A2 (en) | 1985-01-23 |
EP0132246A3 EP0132246A3 (en) | 1986-12-30 |
EP0132246B1 true EP0132246B1 (en) | 1989-09-06 |
Family
ID=20352001
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84850226A Expired EP0132246B1 (en) | 1983-07-18 | 1984-07-18 | Printing unit |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0132246B1 (en) |
AT (1) | ATE46109T1 (en) |
DE (1) | DE3479642D1 (en) |
SE (1) | SE454664B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE453172B (en) * | 1987-02-13 | 1988-01-18 | Jan Nicolai Stenqvist | PRESSURE EFFECTS |
SE9603083D0 (en) * | 1996-08-26 | 1996-08-26 | Jan Stenqvist | Printing unit |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1274687B (en) * | 1966-12-15 | 1968-08-08 | Telefunken Patent | Large base DF antenna system and evaluation and display device for such an antenna system |
DE2234089C3 (en) * | 1972-07-08 | 1975-01-23 | Automatic Druckmaschinenfabrik Dr. W. Hinniger U. Soehne, 1000 Berlin | Offset web-fed rotary printing press |
IT1044283B (en) * | 1974-05-24 | 1980-03-20 | Fischer & Krecke Kg | MULTI-CYLINDER TYPOGRAPHIC PRINTING MACHINE IN PARTICULAR FLEXOGRAPHIC PRINTING MACHINE |
DE2746878C2 (en) * | 1977-10-19 | 1982-05-27 | Jan 26060 Kvindinge Stenqvist | Printing unit |
-
1983
- 1983-07-18 SE SE8304024A patent/SE454664B/en not_active IP Right Cessation
-
1984
- 1984-07-18 AT AT84850226T patent/ATE46109T1/en not_active IP Right Cessation
- 1984-07-18 DE DE8484850226T patent/DE3479642D1/en not_active Expired
- 1984-07-18 EP EP84850226A patent/EP0132246B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3479642D1 (en) | 1989-10-12 |
EP0132246A2 (en) | 1985-01-23 |
SE8304024D0 (en) | 1983-07-18 |
SE454664B (en) | 1988-05-24 |
ATE46109T1 (en) | 1989-09-15 |
SE8304024L (en) | 1985-01-19 |
EP0132246A3 (en) | 1986-12-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5312569A (en) | Method for marring fiber optic substrates | |
US4995316A (en) | Screen printing machine squeegee support arrangement | |
JP4436497B2 (en) | Positioning device for printing press | |
EP0132246B1 (en) | Printing unit | |
US4463675A (en) | Doctor device | |
US4127066A (en) | Adjustable compression roller apparatus | |
JP4637983B2 (en) | Device for positioning a cylinder of a printing press, printing press having this device, and method for operating a printing press | |
EP1398152B1 (en) | Flexographic machine | |
EP0796737B1 (en) | Cleaning device on rotary printing machines | |
US4119031A (en) | Apparatus for applying and withdrawing a pressure cylinder acting on the plate cylinder in an intaglio printing press | |
SG28385G (en) | Clamping device and tensioning device | |
GB2253372A (en) | Tripping the blanket cylinders in an offset perfector. | |
US5555806A (en) | Roller assembly in an inking unit or a damping unit of a rotary printing machine | |
US4949558A (en) | Sealing heads for an enclosure for continuous steam treatment of textile yarns | |
US4991503A (en) | High pressure intaglio cantilever press | |
KR930002091A (en) | Engrave printing machine | |
EP0796736B1 (en) | Cleaning device on rotary printing machines | |
US3413918A (en) | Gravure proof press | |
GB2271082A (en) | Printing presses. | |
SE8700575D0 (en) | PRESSURE EFFECTS | |
CA2480702C (en) | Inking or dampening unit 0f a rotary press | |
JP2000127343A (en) | Locking apparatus for printer and printer there with | |
US3613577A (en) | Rotary web processing machines | |
US5740735A (en) | Apparatus for securing a surface | |
EP0921945B1 (en) | Printing unit |
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 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19870123 |
|
17Q | First examination report despatched |
Effective date: 19880329 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
ITF | It: translation for a ep patent filed |
Owner name: NOTARBARTOLO & GERVASI S.R.L. |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19890906 Ref country code: NL Effective date: 19890906 Ref country code: LI Effective date: 19890906 Ref country code: CH Effective date: 19890906 Ref country code: BE Effective date: 19890906 Ref country code: AT Effective date: 19890906 |
|
REF | Corresponds to: |
Ref document number: 46109 Country of ref document: AT Date of ref document: 19890915 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 3479642 Country of ref document: DE Date of ref document: 19891012 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
ET | Fr: translation filed | ||
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
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 |
|
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: 19900731 |
|
26N | No opposition filed | ||
ITTA | It: last paid annual fee | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19930716 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19940718 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19940718 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19950708 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19950710 Year of fee payment: 12 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19970328 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19970402 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |