GB2180502A - Device for the axial reciprocation of ink distributing rollers of a printing machine - Google Patents
Device for the axial reciprocation of ink distributing rollers of a printing machine Download PDFInfo
- Publication number
- GB2180502A GB2180502A GB08622356A GB8622356A GB2180502A GB 2180502 A GB2180502 A GB 2180502A GB 08622356 A GB08622356 A GB 08622356A GB 8622356 A GB8622356 A GB 8622356A GB 2180502 A GB2180502 A GB 2180502A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crank
- rollers
- roller
- groove
- connecting rod
- 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
Links
- 238000007639 printing Methods 0.000 title claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 23
- 238000007645 offset printing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims 1
- 238000002789 length control Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/15—Devices for moving vibrator-rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/30—Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Image Generation (AREA)
Abstract
The amplitude of the axial reciprocation of ink vibrator rollers (1) may be adjusted while the press is in operation. As shown, a control member (11) is pivoted at (25) and bears an arcuate slot (12) along which the end (17) of a connecting rod (7) is constrained to slide when driven by crank (20). A second connecting rod (6) acts between the end (17) and a known type of rocking arrangement 1-5. The slot (12) is such that the control plate may be rotated so as to place the centre of curvature of the slot coincident with rocking axis (26), under which situation no rocking can occur. As the plate (11) is rotated (by wheel 16) the rocking amplitude increases. <IMAGE>
Description
SPECIFICATION
Device for the axial displacement of ink distributing rollers of a printing machine
The present invention relates to a device which makes it possible to control the length of axial displacement of ink distributing rollers of the inking unit of a printing machine and particularly relates to a device for use in an offset printing machine.
It is known to provide one or more ink distributing rollers in an offset printing machine which are held in contact with ink carrying rollers and are vibrated axially so as to spread more evenly the ink carried by the ink carrying rollers. It is known also to provide means for adjusting the amplitude of the axial vibration i.e. the axial displacement length of the distributing roller.
The driving unit for axial displacement of the inking unit distributing rollers hitherto known, by means of which a length control of the axial displacement is possible, has its drive derived by crank action from an eccentrically mounted drive pin connected by means of a tie rod to reciprocating drive levers co-operating with push-pull rollers fastened at the end of the distributing rollers. The length of the axial displacement of the distributing rollers is changed by moving the eccentric driving pin.
During adjustment of the radial position of the eccentric pin with respect to its centre of rotation, the distributing rollers can not perform any axial displacement. The disadvantage of this device is therefore that the change of the position of the eccentric pin can be performed only when the machine is stopped.
Another known device for changing the length of the axial displacement of the ink distributing rollers includes individual adjustment of the linkage transmitting push-pull motion to each roller. Thus, the whole device becomes complicated, failure prone, and requires regular maintenance. The adjustment of the length of the axial displacement of distributing rollers is also slow and requires skill.
According to the present invention there is disclosed a device for providing reciprocating axial displacement of one or more ink distributing rollers of a printing machine comprising a continuously rotatable first crank means, a connecting rod pivotally connected at one end to the first crank means and having a second end received in a guide groove of a control means such that continuous rotation of the first crank means produces reciprocating movement of the second end along the groove, a tie rod pivotally connected at one end to the second end of the connecting rod so as to be reciprocatingly moveable therewith along the groove and at its second end to a second crank means such that reciprocating longitudinal movement of the tie rod in turn produces reciprocating rotational movement of the second crank means, and linkage means connected to the second crank means for converting rotational movement thereof into axial displacement of one or more ink distributing rollers, the first and second crank means being positioned relative to the control means such that an angle greater than zero is formed between the tie rod and the connecting rod and wherein the control means comprises means for varying the attitude of the guide groove relative to the tie rod and the connecting rod so as to vary the extent of reciprocating movement transmitted to the second crank means and hence to vary the extent of axial displacement of the-ink distributing rollers.
Preferably the groove is curved with a radius of curvature equal to the length of the tie rod.
The linkage means preferably comprises a triple-armed balance beam, which is provided on two of its arms with entraining or follower rollers mounted in driving plates connected to the ink distributing rollers of the inking unit of the printing machine. The driving plates are preferably parallel discs coaxially mounted at one end of a distributing roller with the follower rollers positioned in between the discs.
The required push or pull transmitted to the distributing roller is applied by contact between the follower rollers and one or other of the discs respectively.
An advantage of the device is that it makes it possible to perform the control of the length of axial displacement of the distributing rollers of the inking unit during operation of the machine, each adjustment being made by means of turning a geared control pin so as to turn the control means and thereby changing the attitude of the groove. A further advantage is the very quick and easy change of the axial displacement length of the inking unit distributing rollers. The above advantages represent better usage of the printing machine, which means higher production.Another advantage consists in that, if the sprocket on the shaft of the ink form roller of the printing machine has half the number of teeth of the driving sprocket of the crank mechanism, it is possible to adjust this sprocket in such manner, that the axial displacement of the distributing rollers takes place, relative to the longitudinal recess of the form roller, always in the same, arbitrarily adjustable position.
One of the possible embodiments is diagrammatically represented in the accompanying drawings of which:
Figure 1 represents a front view of the whole device, and
Figure 2 a side view of the triple-armed balance beam.
The device according to the present invention consists of a side plate 19, in which a first crank 8 is rotatably mounted, which crank is fixedly connected with a driving sprocket 9 driven by chain 10. Crank 8 is connected by means of pivot 20 to one end of a connecting rod 7 which is provided at its second end with a roller 17. Roller 17 is located inside a guide groove 12 of a control means comprising a control segment 11 which is rotatably mounted on the side plate 19 on an axis 25.
The control segment 11 is a segment of a disc or plate and is connected with a gear 14 with which a further gear 16 is engaged. The gear 16 is fastened on a control pin 15 which is mounted rotatably in the side plate 19. The control segment 11 is provided with a stop groove 13. The connecting tie rod 6 is pivotally connected to the second end of the connecting rod 7 and engages a second crank 22 driving a triple-armed balance beam 5, which is mounted swingably in a bracket 23, which is mounted on the side plate 19. The triplearmed balance beam 5 is provided on two arms with entraining or follower rollers 3, which are located in driving plates 2 fixedly connected to the distributing rollers 1 of the inking unit. The balance beam 4 is swingably fastened in a bracket 24, which is fastened to the side plate 19.The balance beam 4 is provided at its ends with entraining rollers 3 located in the driving plates 2.
The device specified above operates as follows: The driving sprocket 9 imparts motion by means of the chain 10 to a first crank mechanism which consists of crank 8, pivot 20 and connecting rod 7. Roller 17, which is fastened at the second end of connecting rod 7, performs a swinging motion in the guide groove 12. The swinging motion of roller 17 is transferred by the connecting tie rod 6 and drives the second crank 22, 26 with a reciprocating rotary movement. This is transmitted to the arm of the triple-armed balance beam 5. The reciprocating swinging motion of the triple-armed balance beam is further transferred by the follower rollers 3 and the driving plates 2 to the distributing rollers
1 of the inking unit.The actual adjustment of the length of axial displacement of the distributing rollers 1 of the inking unit is performed by slightly turning the control segment 11 by means of gears 14, 16 and control pin 15 provided with a position arrestment in co-operation with stop groove 13. When adjusting the driving groove 12 into its rest position 18, the connecting tie rod 6 performs a swinging motion with the constant centre of oscillation 26 of radius R and the distributing rollers 1 of the inking unit do not perform any axial displacement.
The maximum axial displacement of the distributing rollers 1 of the inking unit and their rest position 18 are determined by the length of the stop groove 13 by means of control pin 15, which forms the stop of these positions.
Whilst the control means has been described above as comprising a groove in which a roller is received it will be apparent that any other equivalent cam means and cam follower may be used to perform the same function, for example a curved rail of the guide means may receive a captive slider to which both tie rod and connecting rod are pivotally connected.
Claims (10)
1. A device for providing reciprocating axial displacement of one or more ink distributing rollers of a printing machine comprising a continuously rotatable first crank means, a connecting rod pivotally connected at one end to the first crank means and having a second end received in a guide groove of a control means such that continuous rotation of the first crank means produces reciprocating movement of the second end along the groove, a tie rod pivotally connected at one end to the second end of the connecting rod so as to be reciprocatingly moveable therewith along the groove and at its second end to a second crank means such that reciprocating longitudinal movement of the tie rod in turn produces reciprocating rotational movement of the second crank means, and linkage means connected to the second crank means for converting rotational movement thereof into axial displacement of one or more ink distributing rollers, the first and second crank means being positioned relative to the control means such that an angle greater than zero is formed between the tie rod and the connecting rod and wherein the control means comprises means for varying the attitude of the guide groove relative to the tie rod and the connecting rod so as to vary the extent of reciprocating movement transmitted to the second crank means and hence to vary the extent of axial displacement of the ink distributing rollers.
2. A device as claimed in claim 1 wherein the groove is curved with a radius of curvature equal to the length of the tie rod.
3. A device as claimed in either of claims 1 and 2 wherein the second end of the connecting rod is provided with a roller captively received in the guide groove such that movement of the second end along the groove is accommodated by rolling action of the roller.
4. A device as claimed in any preceding claim wherein the control means is a plate which is rotatably mounted to provide means for varying the attitude of the guide groove and is provided with stop means for limiting the angular adjustment of the plate.
5. A device as claimed in any preceding
claim wherein the second crank means is con
nected to two ink distributing rollers by means
of radially extending arms fixedly connected to the crank means for rotation therewith and
each having at their outer end means for axi
ally pushing or pulling a respective distributing
roller in response to rotation of the second crank means.
6. A device as claimed in claim 5 wherein a third ink distributing roller is axially reciproctable in synchronism with the other two rollers by means of a mechanical linkage therebetween.
7. A device for providing reciprocating axial displacement of ink distributing rollers of a printing machine substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
8. Device for axial displacement of distributing rollers of the inking unit, making possible to control the length thereof during operation of the machine, particularly in offset printing machines, characterised in that the driving sprocket (9) is provided with crank (8), which is connected through intermediary of pivot (20) with connecting rod (7), which is provided with roller (7), said roller being placed inside driving groove (12) of control segment (11) rotatable about axis (25).
9. Device as claimed in claim 1, characterised in that the connecting tie rod (6) is connected by intermediary of first crank (21) with roller (17), and at the other end by means of second crank (22) with the triple-armed balance beam (5), which is provided on two arms with entraining rollers (3), mounted in driving plates (2), the length of the connecting tie rod (6) being coincident with the curvature of the driving groove (12).
10. Device as claimed in claims 1 and 2, characterised in that the balance beam (4) is provided with entraining rollers (3) which are mounted in the driving plates (2) connected with the distributing rollers (1) of the inking unit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS661685A CS250525B1 (en) | 1985-09-17 | 1985-09-17 | Device for inking unit's rubbing-down rollers' axial shifting |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8622356D0 GB8622356D0 (en) | 1986-10-22 |
| GB2180502A true GB2180502A (en) | 1987-04-01 |
| GB2180502B GB2180502B (en) | 1989-08-23 |
Family
ID=5413623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8622356A Expired GB2180502B (en) | 1985-09-17 | 1986-09-17 | Device for the axial displacement of ink distributing rollers of a printing machine |
Country Status (4)
| Country | Link |
|---|---|
| CS (1) | CS250525B1 (en) |
| DD (1) | DD262753A3 (en) |
| DE (1) | DE3629825A1 (en) |
| GB (1) | GB2180502B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2295355A (en) * | 1994-11-28 | 1996-05-29 | Heidelberger Druckmasch Ag | Axially reciprocating distributor roller for the inking unit of a printing machine |
| EP0924072A1 (en) * | 1997-12-17 | 1999-06-23 | Heidelberger Druckmaschinen Aktiengesellschaft | Method for operating a rotary printing machine and device in a rotary printing machine |
| US6526888B2 (en) | 2000-12-01 | 2003-03-04 | Heidelberger Druckmaschinen Ag | Reduced vibration printing press and method |
| RU2236946C2 (en) * | 2000-12-01 | 2004-09-27 | Хайдельбергер Друкмашинен Акциенгезельшафт | Method for reducing vibration of typewriter |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3934067C2 (en) * | 1989-10-12 | 1994-06-16 | Miller Johannisberg Druckmasch | Inking unit of a printing press with an oscillating application roller |
| DE3934070A1 (en) * | 1989-10-12 | 1991-04-25 | Miller Johannisberg Druckmasch | CHANGING APPLICATION ROLLER OF A INK PRINTING MACHINE |
| DE19860190A1 (en) | 1998-02-04 | 1999-08-05 | Heidelberger Druckmasch Ag | Cylinder cleaning device for printing machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1015453B (en) * | 1956-02-25 | 1957-09-12 | Buchdruckmaschinenwerk Leipzig | Device for lateral movement of the distribution rollers of an inking unit on printing machines |
| DE3243582C2 (en) * | 1982-11-25 | 1984-09-27 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | Device for changing the axial stroke of a distribution roller in a printing machine |
-
1985
- 1985-09-17 CS CS661685A patent/CS250525B1/en unknown
-
1986
- 1986-09-02 DE DE19863629825 patent/DE3629825A1/en active Granted
- 1986-09-03 DD DD29415386A patent/DD262753A3/en not_active IP Right Cessation
- 1986-09-17 GB GB8622356A patent/GB2180502B/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2295355A (en) * | 1994-11-28 | 1996-05-29 | Heidelberger Druckmasch Ag | Axially reciprocating distributor roller for the inking unit of a printing machine |
| FR2727351A1 (en) * | 1994-11-28 | 1996-05-31 | Heidelberger Druckmasch Ag | DEVICE FOR IMPOSING ALTERNATIVE AXIAL MOVEMENTS TO TRANSFER ROLLS OF THE INK MECHANISM OF PRINTING MACHINES |
| US5619922A (en) * | 1994-11-28 | 1997-04-15 | Heidelberger Druckmaschinen Aktiengesellschaft | Device for moving rollers in a printing press |
| GB2295355B (en) * | 1994-11-28 | 1998-04-22 | Heidelberger Druckmasch Ag | An inking unit for a printing machine having at least one axially reciprocating distributor roller |
| EP0924072A1 (en) * | 1997-12-17 | 1999-06-23 | Heidelberger Druckmaschinen Aktiengesellschaft | Method for operating a rotary printing machine and device in a rotary printing machine |
| US6578481B1 (en) | 1997-12-17 | 2003-06-17 | Heidelberger Druckmaschinen Ag | Method and device for operating a rotary printing press |
| US6526888B2 (en) | 2000-12-01 | 2003-03-04 | Heidelberger Druckmaschinen Ag | Reduced vibration printing press and method |
| US6615726B2 (en) | 2000-12-01 | 2003-09-09 | Heidelberger Druckmaschinen Ag | Reduced vibration printing press and method |
| RU2236946C2 (en) * | 2000-12-01 | 2004-09-27 | Хайдельбергер Друкмашинен Акциенгезельшафт | Method for reducing vibration of typewriter |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8622356D0 (en) | 1986-10-22 |
| GB2180502B (en) | 1989-08-23 |
| DD262753A3 (en) | 1988-12-14 |
| DE3629825A1 (en) | 1987-03-26 |
| DE3629825C2 (en) | 1988-10-27 |
| CS250525B1 (en) | 1987-04-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920917 |