EP2093056B1 - Printing unit for web printing press - Google Patents
Printing unit for web printing press Download PDFInfo
- Publication number
- EP2093056B1 EP2093056B1 EP08425104A EP08425104A EP2093056B1 EP 2093056 B1 EP2093056 B1 EP 2093056B1 EP 08425104 A EP08425104 A EP 08425104A EP 08425104 A EP08425104 A EP 08425104A EP 2093056 B1 EP2093056 B1 EP 2093056B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate cylinder
- support
- handle
- printing unit
- anilox roll
- 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.)
- Not-in-force
Links
- 238000007774 anilox coating Methods 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
Images
Classifications
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- 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
- B41F13/26—Arrangement of cylinder bearings
- B41F13/30—Bearings mounted on sliding supports
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2200/00—Printing processes
- B41P2200/10—Relief printing
- B41P2200/12—Flexographic printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
- B41P2227/20—Means enabling or facilitating exchange of tubular printing or impression members, e.g. printing sleeves, blankets
- B41P2227/21—Means facilitating exchange of sleeves mounted on cylinders without removing the cylinder from the press
Definitions
- the present invention relates to a printing unit for a web printing press.
- a printing press comprises a plurality of printing units through which is fed the web material to be printed, which may be paper, cardboard, self-adhesive paper, plastic, or a composite laminate web.
- Each printing unit serves to apply a colour to the web material, and substantially comprises a set of three rollers between which is fed the web material (henceforth also called film for brevity's sake), onto which the colour is transferred.
- This set of three rollers comprises in particular an inking roller or anilox roll, which has on its outer surface a plurality of cells to retain the ink.
- the anilox roll collects the ink from a rubber roller that dips into a special pan or directly from a container, called “enclosed doctor blade” adapted to fill the cells of the anilox roll and transfers the ink to a plate cylinder, which in turn applies it to a film that is fed between said plate cylinder and a large-sized impression cylinder or drum.
- the above mentioned three rollers of the printing unit have their axes parallel to each other and generally horizontal.
- the impression cylinder belongs to the fixed structure of the machine, in that it does not require replacement or changes in position and it is normally common to the various printing units, which are disposed along its circumference, whereas the anilox roll and the plate cylinder are subject to frequent replacement or changes in position; for this reason they are mounted on supports sliding on the frame of the press and driven by means of screws mounted and anchored in the side parts of the frame of the press.
- the replacement of the plate cylinder is required each time the format is changed, that is when a change in the length of the outer surface of the cylinder, and therefore a change in diameter, is required.
- the changing of the sleeves of the plate cylinder and of the anilox roll is long and complex.
- such a sleeve change takes place in two steps. In the first step the operator must release the end of the cylinder mandrel from its support. In the second step the operator must move the support to create sufficient space to change the sleeve.
- Both these steps are complex.
- the operator in the first step the operator must work in a tight space because of the presence of the support.
- the operator In the second step the operator has difficulty in moving the support, in that the drive screw threads in the support and thus the movement of the support is tied to the operation of the drive screw.
- Object of the present invention is to overcome the drawbacks of the prior art by providing a printing unit that is practical, versatile and able to ensure a rapid and easy changing of the sleeves of the anilox rolls and of the plate cylinders.
- one object of the invention is to release the support of the plate cylinder and of the anilox roll both from the mandrel and from the drive screw to ensure a rapid sleeve changing.
- the printing unit for a web printing press comprises:
- the printing unit according to the invention further comprises at least one handle mounted in at least one of said supports and which can be operated by the operator so as to uncouple said support both from the end of the mandrel of said plate cylinder or of said anilox roll and from said drive screw.
- the operator by means of said handle, can move the relative support in translation, without it interfering with the mandrel of the plate cylinder or of the anilox roll or with the drive screw of the support, so as to leave a sufficient space for changing the sleeve.
- the printing unit according to the invention designated as a whole with the reference numeral 100, is described with the aid of the figures. Many parts shown in Figures 1-3 , although shown singly, are to be understood as pairs disposed symmetrically on the two opposite sides of the press.
- the printing unit 100 comprises a first pair of supports 1 adapted to support a plate cylinder 2 and a second pair of supports 3 adapted to support an anilox roll or inking roller 4 provided with a plurality of cells on its outer surface.
- the supports 1 and 3 are mounted on recirculating ball or roller carriages, in turn mounted slidingly on linear guides 5 arranged horizontally, in the longitudinal direction of the press.
- the carriages are mounted integrally with the respective supports (1, 3) and the guides 5 are mounted integrally with the sides 50 of the press frame.
- a container called "enclosed doctor blade” (not shown), designed to be filled with paint or with ink and adapted to fill the cells engraved on the anilox roll 4 with paint or with ink, is mounted on the anilox roll 4.
- the anilox roll 4 transfers the ink to the plate cylinder 2, which is pressed against a large-sized impression cylinder or drum 7, which is generally motorised.
- the film of web material (not shown), running on the drum 7, passes in the gap between the drum 7 and the plate cylinder 2 which is responsible for the transferring of the image.
- the supports (1, 3) of the plate cylinder and of the anilox roll are driven by means of respective ball screws 6 driven in translation by respective female screws 60 mounted rotatably in the side 50 of the press.
- the female screws 60 are made to turn by means of electric motors 66, possibly through a belt transmission.
- the screws 6 are disposed longitudinally between the two guides 5.
- the side 50 of the press has an opening 51 through which the screws 6 pass.
- the opening 51 is sufficiently large to allow the removal and/or the insertion of the sleeve of the plate cylinder 2 or of the anilox roll 4 during the changing of the sleeve.
- a handle 8 which protrudes on the operator side so as to be able to be gripped by an operator, is mounted on each support (1, 3).
- the handle 8 is adapted to uncouple the respective support (1, 3) both from the drive screw 6 and from the respective plate cylinder 2 or anilox roll 4.
- a locking/unlocking device 9 that can be operated by the operator is also mounted on each support (1, 3) to lock the handle 8 during the operation of the press and to unlock the handle 8 for changing the sleeve.
- Figure 7 shows a sectional view, taken along a horizontal plane of section at the level of the axis of the plate cylinder 2, illustrating one of the two supports 1 of the plate cylinder, that is to say the support 1 disposed on the operator side.
- the support 3 of the anilox roll disposed on the operator side has a substantially similar structure.
- the support 1 has a transverse through hole 10 designed to accommodate the end 20 of a mandrel 21 that supports the sleeve 22 of the plate cylinder.
- the support 1 has a cylindrical tang 11 which protrudes rearward, that is towards the inside of the machine.
- the tang 11 has a side opening 12 adapted to allow the passage of the end 20 of the mandrel.
- a longitudinal hole 13 communicating with the transverse hole 10 is formed in the support 1.
- the longitudinal hole 13 has a smaller diameter than the transverse hole 10 and is adapted to slidingly accommodate the drive screw 6.
- the longitudinal hole 13 is situated near the rear surface of the support 1.
- a second transverse hole 14 which opens in the front surface of the support 1 and which communicates with the longitudinal hole 13 is formed in the support 1.
- the second transverse hole 14 has a smaller diameter than the longitudinal hole 13 and is disposed at a certain distance from the first longitudinal hole 10.
- the second transverse hole 14 has a tapered end 15 communicating with the longitudinal hole 13.
- the drive screw 6 has at its end a cylindrical block 61, secured by means of an axial bolt 62.
- the cylindrical block 61 has radially a tapered hole 63 with a taper that is the exact continuation of the tapered part 15 of the second transverse hole 14.
- a sleeve 68 which provides an abutment surface against the support 1, so as to act as a stop, is mounted on the screw 6.
- the handle 8 comprises a plate 80 from which protrudes forward a U-shaped handgrip 81, adapted to be gripped by a hand of the operator.
- a first tang 82 and a second tang 83 protrude rearward from the two ends of the plate 80.
- the first tang 82 carries at its end a sleeve 84, which has a circular seat 85 within which the end 20 of the plate cylinder mandrel can rotate. Ball or roller bearings are disposed in the seat 85 of the sleeve to facilitate the rotation of the end 20 of the mandrel.
- the sleeve 84 of the handle has such a diameter as to be able to be inserted into the first transverse hole 10 of the support 1.
- the second tang 83 of the handle has a tapered end 86 adapted to couple, in a conical coupling relationship, with the tapered holes 15 and 63 formed respectively in the second transverse hole 14 of the support 1 and in the end block 61 of the drive screw 6.
- a locking appendage 87 disposed in a central position between the two tangs 82 and 83, protrudes rearward from the plate 80 of the handle.
- the locking appendage 87 is in the form of a plate, bent in an L-shape, which has at its end a U-shaped opening 88.
- the locking/unlocking device 9 comprises a lever 90 that can be operated by the operator.
- the lever 90 has an end flange supporting a bolt 91 slidable in a vertical groove 92 formed in a block 93 integral with the front surface of the support 1.
- the block 93 is disposed between the two holes (10, 14) of the support that accommodate the two tangs (82, 83) of the handle. In this manner, when the two tangs (82, 83) of the handle are disposed in the two holes (10, 14) of the support, the bolt 91 engages in the opening 88 of the locking appendage 87 of the handle, locking the handle 8 integrally to the support 1.
- the handles 8 are initially locked integrally to the respective supports 1 and 3 of the plate cylinder 2 and of the anilox roll 4.
- the levers 90 of the locking/unlocking devices 9 are disposed so that the bolt 91 engages in the opening 88 of the locking appendage of the handles 8 of the supports 1 and 3 of the plate cylinder and of the anilox roll. In this situation the levers 90 are inclined with respect to a vertical direction.
- the ends 20 of the mandrels of the plate cylinder and of the anilox roll are engaged inside the respective sleeves 84 of the handles, so as to rotatably support the mandrels.
- the truncated conical ends 86 of the tangs of the handles are engaged in the tapered holes 63 of the ends of the respective drive screws 6 so as to make the supports (1, 3) integral with the drive screws 6.
- the plate cylinder 2 is in contact with the drum 7 and the anilox roll 4 is in contact with the plate cylinder 2.
- the operator can move the support 1 towards the left (in the direction of the arrow F4 in Figure 6A ) by means of the handle 8, freeing the space for the replacement of the sleeve 22 of the plate cylinder.
- the end 20 of the mandrel does not interfere with the tang 11 of the support 1, in that it passes through the opening 12 of the tang 11.
- the screw 6 does not interfere with the support 1, in that the cylinder block 61 at the end of the screw slides freely in the longitudinal hole 13 of the support 1.
- the support 1 is supported slidingly on the linear guides 5 of the side of the press.
- the support 1 comes to abut against the stop sleeve 68 mounted on the screw 6, enough space is left for the extraction of the sleeve 22 and for the replacement thereof with another sleeve of a different format.
- the operator pushes the support 1 towards the right, until the end 20 of the mandrel re-enters the hole 10 of the tang 11 of the support.
- the truncated conical hole 63 of the end block of the screw 6 is in register with the hole 14 of the support 1.
- the operator pushes the handle 8 towards the support 1.
- the end 20 of the mandrel engages in the sleeve 84 of the first tang 82 of the handgrip and the tapered end 86 of the second tang of the handgrip engages in the tapered hole 63 of the end of the screw.
- the operator operates the locking lever 90, so that the handle 8 is locked firmly to the support 1.
- Figures 4-9 show an embodiment relating to the changing of the sleeve of the plate unit, it is obvious that the sleeve changing on the anilox unit takes place in the same manner; in fact the support 3 of the anilox unit is made in substantially the same way as the support 1 of the plate unit.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Presses (AREA)
- Unwinding Webs (AREA)
Abstract
Description
- The present invention relates to a printing unit for a web printing press.
- As is known, a printing press comprises a plurality of printing units through which is fed the web material to be printed, which may be paper, cardboard, self-adhesive paper, plastic, or a composite laminate web.
- Each printing unit serves to apply a colour to the web material, and substantially comprises a set of three rollers between which is fed the web material (henceforth also called film for brevity's sake), onto which the colour is transferred.
- This set of three rollers comprises in particular an inking roller or anilox roll, which has on its outer surface a plurality of cells to retain the ink. The anilox roll collects the ink from a rubber roller that dips into a special pan or directly from a container, called "enclosed doctor blade" adapted to fill the cells of the anilox roll and transfers the ink to a plate cylinder, which in turn applies it to a film that is fed between said plate cylinder and a large-sized impression cylinder or drum.
- The structural details of the various rollers of a printing unit are not further described, in that they are to be considered per se known, and in any case not forming the specific subject matter of the invention.
- The above mentioned three rollers of the printing unit have their axes parallel to each other and generally horizontal. In a printing unit the impression cylinder belongs to the fixed structure of the machine, in that it does not require replacement or changes in position and it is normally common to the various printing units, which are disposed along its circumference, whereas the anilox roll and the plate cylinder are subject to frequent replacement or changes in position; for this reason they are mounted on supports sliding on the frame of the press and driven by means of screws mounted and anchored in the side parts of the frame of the press.
- In particular, in the majority of printing units currently existing, the replacement of the plate cylinder is required each time the format is changed, that is when a change in the length of the outer surface of the cylinder, and therefore a change in diameter, is required.
- At each change of image, which does not require a change in the diameter of the plate cylinder, only the replacement of the plate with the new image is required.
- According to the prior art, the changing of the sleeves of the plate cylinder and of the anilox roll is long and complex. In fact, such a sleeve change takes place in two steps. In the first step the operator must release the end of the cylinder mandrel from its support. In the second step the operator must move the support to create sufficient space to change the sleeve.
- Both these steps are complex. In fact in the first step the operator must work in a tight space because of the presence of the support. In the second step the operator has difficulty in moving the support, in that the drive screw threads in the support and thus the movement of the support is tied to the operation of the drive screw.
- Object of the present invention is to overcome the drawbacks of the prior art by providing a printing unit that is practical, versatile and able to ensure a rapid and easy changing of the sleeves of the anilox rolls and of the plate cylinders.
- In particular, one object of the invention is to release the support of the plate cylinder and of the anilox roll both from the mandrel and from the drive screw to ensure a rapid sleeve changing.
- These objects are achieved with the printing unit according to the invention which has the characteristics listed in appended
independent claim 1. - Advantageous embodiments of the invention are described in the dependent claims.
- The printing unit for a web printing press according to the invention comprises:
- a plate cylinder mounted rotatably at its ends on two supports mounted to slide horizontally on linear guides integral with the sides of the press structure, said plate cylinder being designed to press against a drum on which the web material for printing runs,
- an anilox roll mounted rotatably at its end on two supports mounted to slide horizontally on said linear guides, said anilox roll being designed to press against said plate cylinder to transfer the ink from the anilox roll to the plate cylinder, and
- drive screws operationally connected to said supports to drive them in translation.
- The printing unit according to the invention further comprises at least one handle mounted in at least one of said supports and which can be operated by the operator so as to uncouple said support both from the end of the mandrel of said plate cylinder or of said anilox roll and from said drive screw.
- In this manner the operator, by means of said handle, can move the relative support in translation, without it interfering with the mandrel of the plate cylinder or of the anilox roll or with the drive screw of the support, so as to leave a sufficient space for changing the sleeve.
- The advantages of the invention, which allows a rapid and easy replacement of the cylinders or of the sleeves, are obvious.
- Further characteristics of the invention will be made clearer by the detailed description that follows, referring to a purely exemplifying and therefore non-limiting embodiment thereof illustrated in the appended figures, wherein:
-
Figure 1 is a diagrammatic side elevation view showing a portion of a side of a printing press in which a printing unit according to the invention is shown in the working state and the print impression cylinder is shown by a dashed line; -
Figure 2 is a view likeFigure 1 showing the printing unit in the dismantling position, in which the plate cylinder and the anilox roll are at a distance from each other; -
Figure 3 is a view likeFigure 1 showing the printing unit in the sleeve changing position, in which the supports have been moved away from the respective plate cylinder and anilox roll; -
Figures 4 ,5 and6 are three enlarged views of the plate unit illustrated inFigures 1 ,2 and3 , respectively; -
Figures 4A ,5A and6A are three sectional views taken respectively along the horizontal planes of section A-A ofFigures 4 ,5 and6 ; -
Figure 7 is a sectional view likeFigure 4A , but showing the plate unit ofFig. 4 exploded; -
Figure 8 is a perspective view of the plate unit ofFigure 4 ; and -
Figure 9 is a perspective view of the handle of the plate unit ofFigure 8 . - The printing unit according to the invention, designated as a whole with the
reference numeral 100, is described with the aid of the figures. Many parts shown inFigures 1-3 , although shown singly, are to be understood as pairs disposed symmetrically on the two opposite sides of the press. - For the sake of clarity, the side of the
press 100 that can be seen inFigures 1-3 is indicated henceforth as the operator side. Furthermore, like reference numerals designate like or similar parts. - With specific reference for now to
Figure 1 , theprinting unit 100 comprises a first pair ofsupports 1 adapted to support aplate cylinder 2 and a second pair ofsupports 3 adapted to support an anilox roll or inkingroller 4 provided with a plurality of cells on its outer surface. Thesupports linear guides 5 arranged horizontally, in the longitudinal direction of the press. The carriages are mounted integrally with the respective supports (1, 3) and theguides 5 are mounted integrally with thesides 50 of the press frame. - A container called "enclosed doctor blade" (not shown), designed to be filled with paint or with ink and adapted to fill the cells engraved on the
anilox roll 4 with paint or with ink, is mounted on theanilox roll 4. In turn, theanilox roll 4 transfers the ink to theplate cylinder 2, which is pressed against a large-sized impression cylinder or drum 7, which is generally motorised. The film of web material (not shown), running on the drum 7, passes in the gap between the drum 7 and theplate cylinder 2 which is responsible for the transferring of the image. - The supports (1, 3) of the plate cylinder and of the anilox roll are driven by means of
respective ball screws 6 driven in translation by respectivefemale screws 60 mounted rotatably in theside 50 of the press. Thefemale screws 60 are made to turn by means ofelectric motors 66, possibly through a belt transmission. Thescrews 6 are disposed longitudinally between the twoguides 5. Theside 50 of the press has an opening 51 through which thescrews 6 pass. The opening 51 is sufficiently large to allow the removal and/or the insertion of the sleeve of theplate cylinder 2 or of theanilox roll 4 during the changing of the sleeve. - According to the invention, a
handle 8, which protrudes on the operator side so as to be able to be gripped by an operator, is mounted on each support (1, 3). Thehandle 8 is adapted to uncouple the respective support (1, 3) both from thedrive screw 6 and from therespective plate cylinder 2 oranilox roll 4. - A locking/
unlocking device 9 that can be operated by the operator is also mounted on each support (1, 3) to lock thehandle 8 during the operation of the press and to unlock thehandle 8 for changing the sleeve. -
Figure 7 shows a sectional view, taken along a horizontal plane of section at the level of the axis of theplate cylinder 2, illustrating one of the two supports 1 of the plate cylinder, that is to say thesupport 1 disposed on the operator side. However, it must be considered that thesupport 3 of the anilox roll disposed on the operator side has a substantially similar structure. - The
support 1 has a transverse throughhole 10 designed to accommodate theend 20 of amandrel 21 that supports thesleeve 22 of the plate cylinder. Coinciding with thetransverse hole 10, thesupport 1 has acylindrical tang 11 which protrudes rearward, that is towards the inside of the machine. As shown also inFigure 8 , thetang 11 has aside opening 12 adapted to allow the passage of theend 20 of the mandrel. - Returning to
Figure 7 , alongitudinal hole 13 communicating with thetransverse hole 10 is formed in thesupport 1. Thelongitudinal hole 13 has a smaller diameter than thetransverse hole 10 and is adapted to slidingly accommodate thedrive screw 6. Thelongitudinal hole 13 is situated near the rear surface of thesupport 1. - A second
transverse hole 14 which opens in the front surface of thesupport 1 and which communicates with thelongitudinal hole 13 is formed in thesupport 1. The secondtransverse hole 14 has a smaller diameter than thelongitudinal hole 13 and is disposed at a certain distance from the firstlongitudinal hole 10. In particular, the secondtransverse hole 14 has a taperedend 15 communicating with thelongitudinal hole 13. - The
drive screw 6 has at its end acylindrical block 61, secured by means of anaxial bolt 62. Thecylindrical block 61 has radially a taperedhole 63 with a taper that is the exact continuation of thetapered part 15 of the secondtransverse hole 14. Asleeve 68, which provides an abutment surface against thesupport 1, so as to act as a stop, is mounted on thescrew 6. - With reference also to
Figure 9 , thehandle 8 comprises aplate 80 from which protrudes forward aU-shaped handgrip 81, adapted to be gripped by a hand of the operator. Afirst tang 82 and asecond tang 83 protrude rearward from the two ends of theplate 80. - The
first tang 82 carries at its end asleeve 84, which has acircular seat 85 within which theend 20 of the plate cylinder mandrel can rotate. Ball or roller bearings are disposed in theseat 85 of the sleeve to facilitate the rotation of theend 20 of the mandrel. Thesleeve 84 of the handle has such a diameter as to be able to be inserted into the firsttransverse hole 10 of thesupport 1. - The
second tang 83 of the handle has a taperedend 86 adapted to couple, in a conical coupling relationship, with the taperedholes transverse hole 14 of thesupport 1 and in theend block 61 of thedrive screw 6. - A locking
appendage 87, disposed in a central position between the twotangs plate 80 of the handle. The lockingappendage 87 is in the form of a plate, bent in an L-shape, which has at its end aU-shaped opening 88. - With reference in particular to
Figures 4 and8 , the locking/unlockingdevice 9 comprises alever 90 that can be operated by the operator. Thelever 90 has an end flange supporting abolt 91 slidable in avertical groove 92 formed in ablock 93 integral with the front surface of thesupport 1. Theblock 93 is disposed between the two holes (10, 14) of the support that accommodate the two tangs (82, 83) of the handle. In this manner, when the two tangs (82, 83) of the handle are disposed in the two holes (10, 14) of the support, thebolt 91 engages in theopening 88 of the lockingappendage 87 of the handle, locking thehandle 8 integrally to thesupport 1. - The sleeve changing operation performed with the
printing unit 100 according to the invention will now be described. - As shown in
Figures 1 ,4 and 4A , thehandles 8 are initially locked integrally to therespective supports plate cylinder 2 and of theanilox roll 4. In particular, thelevers 90 of the locking/unlockingdevices 9 are disposed so that thebolt 91 engages in theopening 88 of the locking appendage of thehandles 8 of thesupports levers 90 are inclined with respect to a vertical direction. - Consequently, the ends 20 of the mandrels of the plate cylinder and of the anilox roll are engaged inside the
respective sleeves 84 of the handles, so as to rotatably support the mandrels. The truncated conical ends 86 of the tangs of the handles are engaged in the taperedholes 63 of the ends of therespective drive screws 6 so as to make the supports (1, 3) integral with the drive screws 6. - During the printing, the
plate cylinder 2 is in contact with the drum 7 and theanilox roll 4 is in contact with theplate cylinder 2. - When the sleeve is to be changed, as shown in
Figure 2 , thefemale screws 60 of the ball screws 6 are turned, so as to cause the axial translation of thescrews 6. The supports (1, 3) of theplate cylinder 2 and of theanilox roll 4 are thus moved together towards the right so that theplate cylinder 2 is moved away from the drum 7. Subsequently, the translation of the screws of the plate unit is blocked and the translation of the screws of the anilox unit continues. As a result, theanilox roll 4 is moved away from theplate cylinder 2 to create a space large enough for changing the sleeve. - At this point, as shown in
Figure 5 , the operator turns the unlockinglever 90, in the direction of the arrow F1, so as to loosen thebolt 91 and pulls it downwards, in the direction of the arrow F2, so that thebolt 91 slides in thegroove 92, releasing the lockingappendage 87 of thehandle 8. Then, as shown inFigure 5A , the operator grips thehandgrip 81 of the handle, pulling it towards himself in the horizontal direction of the arrow F3, so as to move it away from thesupport 1. - As a result, the
tangs respective holes support 1. Thus, theend 20 of themandrel 21 is released from thesleeve 84 and at the same time the truncatedconical end 86 of thesecond tang 83 of the handle is released from the taperedhole 63 of theend block 61 of thescrew 6. It should be noted that with a single manoeuvre by the operator, thesupport 1 is released both from themandrel 21 and from thescrew 6. - At this point, as shown in
Figures 3 ,6 and 6A , the operator can move thesupport 1 towards the left (in the direction of the arrow F4 inFigure 6A ) by means of thehandle 8, freeing the space for the replacement of thesleeve 22 of the plate cylinder. It should be noted that theend 20 of the mandrel does not interfere with thetang 11 of thesupport 1, in that it passes through theopening 12 of thetang 11. Furthermore, thescrew 6 does not interfere with thesupport 1, in that thecylinder block 61 at the end of the screw slides freely in thelongitudinal hole 13 of thesupport 1. - In any case, during its translation the
support 1 is supported slidingly on thelinear guides 5 of the side of the press. When thesupport 1 comes to abut against thestop sleeve 68 mounted on thescrew 6, enough space is left for the extraction of thesleeve 22 and for the replacement thereof with another sleeve of a different format. - Once the sleeve has been replaced, the operator, by means of the
handle 8, pushes thesupport 1 towards the right, until theend 20 of the mandrel re-enters thehole 10 of thetang 11 of the support. In this situation, the truncatedconical hole 63 of the end block of thescrew 6 is in register with thehole 14 of thesupport 1. At this point the operator pushes thehandle 8 towards thesupport 1. In this manner, theend 20 of the mandrel engages in thesleeve 84 of thefirst tang 82 of the handgrip and thetapered end 86 of the second tang of the handgrip engages in the taperedhole 63 of the end of the screw. Lastly, the operator operates the lockinglever 90, so that thehandle 8 is locked firmly to thesupport 1. - Even if
Figures 4-9 show an embodiment relating to the changing of the sleeve of the plate unit, it is obvious that the sleeve changing on the anilox unit takes place in the same manner; in fact thesupport 3 of the anilox unit is made in substantially the same way as thesupport 1 of the plate unit. - It is clear, however, that the invention is not limited to the particular embodiment previously described and illustrated in the appended claims, but numerous modifications of detail within the reach of a person skilled in the art can be made thereto and are all to be understood as falling within the scope of the invention, as set forth in the appended claims.
Claims (10)
- A printing unit (100) for a printing press for web material comprising:- a plate cylinder (2) mounted rotatably at its ends (20) on two supports (1) mounted to slide horizontally on linear guides (5) integral with the sides (50) of the press structure, said plate cylinder (2) being destined to press against a drum (7) on which the web material for printing runs,- an anilox roll (4) mounted rotatably at its ends (20) on two other supports (3) mounted to slide horizontally on said linear guides (5), said anilox roll (4) being designed to press against said plate cylinder (2) to transfer the ink from the anilox roll (4) to the plate cylinder (2), and- drive screws (6) operationally connected to said supports (1, 3) to drive them in translation,characterised in that it further comprises:- at least one handle (8) mounted in at least one of said supports (1, 3) and which is adapted to uncouple said support (1, 3) both from the end (20) of the mandrel of said plate cylinder (2) or of said anilox roll (4) and from said drive screw (6).
- A printing unit (100) according to claim 1, characterised in that said handle (8) comprises:- a first tang (82) carrying at its end a sleeve (84) in which is formed a seat (85) adapted to accommodate rotatably the end (20) of said mandrel of the plate cylinder (2) or of the anilox roll (4), and- a second tang (83), the end of which engages in a seat (63) of said drive screw (6).
- A printing unit (100) according to claim 2, characterised in that said support (1, 3) comprises:- a first transverse through hole (10) in which said sleeve (84) of the handle (8) can slide,- a longitudinal hole (13) in which said drive screw (6) can slide, and- a second transverse hole (14) opening on the outer surface of the support and communicating with said longitudinal hole (13), said second tang (83) of the handle (8) being able to slide in said second transverse hole (14).
- A printing unit (100) according to claim 2 or 3, characterised in that said second tang (83) of the handle (8) has a tapered end (86) adapted to engage, in a conical coupling relationship, with a tapered seat (63) formed radially in a cylindrical block (61) disposed at the end of said drive screw (6).
- A printing unit according to any one of the claims from 2 to 4, characterised in that a ball or roller bearing assembly is disposed in said seat (85) of the sleeve of the first tang (82) of the handle (8) to support the end (20) of the mandrel rotatably.
- A printing unit according to any one of the claims from 2 to 5, characterised in that said support (1, 3) comprises a tang (11) protruding towards the inside of the press and passed through by said first transverse hole (10), said tang (11) having a side opening (12) adapted to allow the passage of the end (20) of said mandrel of the plate cylinder (2) or of the anilox roll (4).
- A print unit according to any one of the preceding claims, characterised in that it comprises a locking/unlocking device (9) that can be operated by the operator to lock/unlock said handle (8) to/from said support (1, 3).
- A printing unit according to claim 7, characterised in that said locking/unlocking device (9) comprises a lever (90) that operates a bolt or pin (91) adapted to engage in a locking seat (88) of said handle (8).
- A printing unit according to any one of the preceding claims, characterised in that it comprises female screws (60) mounted rotatably in the side (50) and operated in rotation by electric motors (66) to cause the translation of said drive screws (6).
- A web printing press, characterised by comprising at least one printing unit (100) according to any one of the preceding claims.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES08425104T ES2339617T3 (en) | 2008-02-21 | 2008-02-21 | PRINT UNIT FOR A PRINT PRESS IN COIL. |
EP08425104A EP2093056B1 (en) | 2008-02-21 | 2008-02-21 | Printing unit for web printing press |
AT08425104T ATE454984T1 (en) | 2008-02-21 | 2008-02-21 | PRINTING UNIT FOR A ROLL-ROLL PRINTING MACHINE |
DE602008000543T DE602008000543D1 (en) | 2008-02-21 | 2008-02-21 | Printing unit for a web-fed rotary printing machine |
KR1020090014395A KR20090091066A (en) | 2008-02-21 | 2009-02-20 | Printing unit for web printing press |
CNA2009101180087A CN101513789A (en) | 2008-02-21 | 2009-02-23 | Printing unit for web printing press |
BRPI0900311-8A BRPI0900311A2 (en) | 2008-02-21 | 2009-02-25 | printing unit for press material press coil printer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08425104A EP2093056B1 (en) | 2008-02-21 | 2008-02-21 | Printing unit for web printing press |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2093056A1 EP2093056A1 (en) | 2009-08-26 |
EP2093056B1 true EP2093056B1 (en) | 2010-01-13 |
Family
ID=39591098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08425104A Not-in-force EP2093056B1 (en) | 2008-02-21 | 2008-02-21 | Printing unit for web printing press |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP2093056B1 (en) |
KR (1) | KR20090091066A (en) |
CN (1) | CN101513789A (en) |
AT (1) | ATE454984T1 (en) |
BR (1) | BRPI0900311A2 (en) |
DE (1) | DE602008000543D1 (en) |
ES (1) | ES2339617T3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103889727A (en) * | 2010-12-10 | 2014-06-25 | 高斯国际美洲公司 | Orbiting cam drive mechanism, pitch changing device and method |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1273544B (en) * | 1995-04-12 | 1997-07-08 | Bielloni Castello S P A | PRINTING MACHINE WITH DEVICE FOR QUICK REPLACEMENT OF THE CYLINDER SHIRTS OF THE INKING UNITS |
US6142073A (en) * | 1999-08-20 | 2000-11-07 | Paper Converting Maching Company | Method and apparatus for exchanging a roll of a printing press |
ITVR20010130A1 (en) * | 2001-12-06 | 2003-06-06 | Of E M S R L | QUICK CHANGE PRINTING GROUP OF SLEEVES IN FLEXOGRAPHIC MACHINES |
-
2008
- 2008-02-21 DE DE602008000543T patent/DE602008000543D1/en active Active
- 2008-02-21 AT AT08425104T patent/ATE454984T1/en not_active IP Right Cessation
- 2008-02-21 EP EP08425104A patent/EP2093056B1/en not_active Not-in-force
- 2008-02-21 ES ES08425104T patent/ES2339617T3/en active Active
-
2009
- 2009-02-20 KR KR1020090014395A patent/KR20090091066A/en not_active Application Discontinuation
- 2009-02-23 CN CNA2009101180087A patent/CN101513789A/en active Pending
- 2009-02-25 BR BRPI0900311-8A patent/BRPI0900311A2/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR20090091066A (en) | 2009-08-26 |
ES2339617T3 (en) | 2010-05-21 |
CN101513789A (en) | 2009-08-26 |
EP2093056A1 (en) | 2009-08-26 |
BRPI0900311A2 (en) | 2010-05-04 |
ATE454984T1 (en) | 2010-01-15 |
DE602008000543D1 (en) | 2010-03-04 |
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