GB1569963A - Drive system for a multi-unit printing machine - Google Patents
Drive system for a multi-unit printing machine Download PDFInfo
- Publication number
- GB1569963A GB1569963A GB5214/78A GB521478A GB1569963A GB 1569963 A GB1569963 A GB 1569963A GB 5214/78 A GB5214/78 A GB 5214/78A GB 521478 A GB521478 A GB 521478A GB 1569963 A GB1569963 A GB 1569963A
- Authority
- GB
- United Kingdom
- Prior art keywords
- printing machine
- gear
- printing
- gear train
- drive system
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Presses (AREA)
- Gear Transmission (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Description
(54) A DRIVE SYSTEM FOR A MULTI-UNIT PRINTING
MACHINE
(71) We, VEB POLYGRAPH LEIPZIG
KOMBINAT FÜR POLYGRAPH3:SCHE MASCEIINEN UND AUSRiiSTUNGEN of 705 Leipzig,
Zeinaundorfer Strasse 59, German Democratic Republic, a corporation organised under the laws of the German Democratic
Republic, a corporation organised under the laws of the German Democratic Republic do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
The present invention relates to a printing machine comprising a plurality of printing mechanisms.
Printing machines are known which are provided with drives having fractional transmission ratios ("Die Tragfähigkeit der Zahnrlider", Thomas, C. Hanser Verlag,
Munich 1957 page 49 and Dubbels Taschenbuch für den Maschinenbau, Berlin,
Heidelberg, New York 1974, page 779 G.c.).
A disadvantage of using fractional transmission ratios in printing machine drives is that the maintenance of registration is unfavourably influenced by low-frequency oscillations and unevennesses of the prints among one another occurs.
Fractional transmission ratios cause a variation of the phase position of the oscillations to the machine cycle which bring about different sheet transfers in the transfer point between printing cylinder and the succeeding cylinder and which lead to print ing disturbances (doubling).
According to the present invention there is provided a printing machine comprising a plurality of printing mechanisms each connected by a respective gear train to a common main shaft, the gear ratio between
mutually meshing gear members of each gear train being an integer.
Each gear train may comprise a spur gear fixed to the main shaft. Each gear train may comprise an input spur gear to provide an input to its respective printing machine.
The common main shaft may be coupled to a drive motor and the gear ratios of mutually meshing gear members or individual transmission stages from the drive motor to the gear members fixed to the common main shaft may be an integer.
The printing mechanisms may be driven centralized or decentralized.
An embodiment of the present invention will be more particularly described by way of example and with reference to the accompanying drawing.
Referring now to the drawing, there is shown a drive of a multi-colour rotary sheet printing machine comprising a first 1, a second 2 and a third printing mechanism 3.
Power is supplied from a drive (not shown) by way of transmission means 4 to a main drive shaft 5. The shaft 5 is connected to each printing mechanism by a respective gear train comprising a first spur gear 7 arranged on the shaft 5 and meshing with a second spur gear 8 arranged on a worm wheel 9. The worm wheel 9 carries a worm 10 meshing with a worm wheel 11 which is connected to an input spur gear 12.
For the gear train associated with the first printing mechanism the gear ratio between the second spur gear 8.I. and the first spur gear 7.I, is two. The gear ratio between the worm wheel 11.I and the worm 10.I is eight.
It is an advantage of the above described embodiment that doubling is largely avoided and the maintenance of registration of the printings is favourable. The above embodiment oscillation generated through spur gear eccentricities and tooth impacts which are not repeated in the machine cycle and thereby prevents faulty sheet transfers, such as register errors and doubling.
Claims (4)
1. A printing machine comprising a plurality of printing mechanisms each connected by a respective gear train to a common main shaft, the gear ratio between mutually meshing gear members of each gear train being an integer.
2. A printing machine as claimed in claim 1, wherein each gear train comprises
a spur gear fixed to the main shaft.
3. A printing machine as claimed in either claim 1 or claim 2, wherein each gear train comprises an input spur gear to provide an input to its respective printing mechanism.
4. A printing machine substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD7700197094A DD130221A1 (en) | 1977-02-10 | 1977-02-10 | DRIVE FOR PRESSURE MACHINES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1569963A true GB1569963A (en) | 1980-06-25 |
Family
ID=5507189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5214/78A Expired GB1569963A (en) | 1977-02-10 | 1978-02-09 | Drive system for a multi-unit printing machine |
Country Status (6)
| Country | Link |
|---|---|
| DD (1) | DD130221A1 (en) |
| DE (1) | DE2750816A1 (en) |
| FR (1) | FR2380136A1 (en) |
| GB (1) | GB1569963A (en) |
| IT (1) | IT1108777B (en) |
| SE (1) | SE417804B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4036023A1 (en) * | 1990-11-13 | 1992-05-14 | Man Miller Druckmasch | Offset printing machine with two printing mechanisms - has number of teeth in gear drive chosen to minimise matching error |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB606394A (en) * | 1945-01-12 | 1948-08-12 | Goss Printing Press Co Ltd | Improvements in printing unit and drive mechanism therefor |
| DE2300699A1 (en) * | 1973-01-08 | 1974-07-11 | Maschf Augsburg Nuernberg Ag | ROLLED ROTARY OFFSET PRINTING MACHINE WITH MULTIPLE PRINTING UNITS WITH AT LEAST FOUR CYLINDERS |
| DD116427A1 (en) * | 1974-09-16 | 1975-11-20 | ||
| DE2447602C3 (en) * | 1974-10-05 | 1980-10-30 | M.A.N.-Roland Druckmaschinen Ag, 6050 Offenbach | Damping device |
-
1977
- 1977-02-10 DD DD7700197094A patent/DD130221A1/en unknown
- 1977-11-14 DE DE19772750816 patent/DE2750816A1/en not_active Ceased
- 1977-11-28 FR FR7735805A patent/FR2380136A1/en active Pending
-
1978
- 1978-02-08 SE SE7801471A patent/SE417804B/en unknown
- 1978-02-09 GB GB5214/78A patent/GB1569963A/en not_active Expired
- 1978-02-10 IT IT67269/78A patent/IT1108777B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| SE7801471L (en) | 1978-08-11 |
| FR2380136A1 (en) | 1978-09-08 |
| IT1108777B (en) | 1985-12-09 |
| DD130221A1 (en) | 1978-03-15 |
| DE2750816A1 (en) | 1978-08-17 |
| SE417804B (en) | 1981-04-13 |
| IT7867269A0 (en) | 1978-02-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |