US3680481A - Frictional gear backlash eliminating means in sheet fed rotary printer - Google Patents

Frictional gear backlash eliminating means in sheet fed rotary printer Download PDF

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Publication number
US3680481A
US3680481A US838090A US3680481DA US3680481A US 3680481 A US3680481 A US 3680481A US 838090 A US838090 A US 838090A US 3680481D A US3680481D A US 3680481DA US 3680481 A US3680481 A US 3680481A
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US
United States
Prior art keywords
sheet
impression cylinder
transfer drum
cylinder
fed rotary
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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 - Lifetime
Application number
US838090A
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English (en)
Inventor
Hubert H A Sternberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
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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

Definitions

  • Foreign Application Pri rity ata printing includes at least one sheet transfer drum for transferring a suitably adjusted sheet from a sheet feed July 1968 Germany 'f' 17 61 7800 table to the grippers of an impression cylinder or from the impression cylinder of one printing stage to an im- [52] US. Cl. ..101/232, 101/183, 101/246 pression cylinder of a succeeding printing Stage, the [51] Int. Cl.
  • I provide the sheet transfer drums with annular raceways or travel rings in prestressed mutual rolling engagement with corresponding annular raceways or travel rings provided for adjacent drums or cylinders.
  • the travel rings are hardened and polished and the driving drum is several hundredths of a millimeter larger in diameter than the driven drum or the cylinder.
  • FIG. 1 is a schematic elevational view partly in section of a two-stage or double printing mechanism of a two-color offset machine
  • FIG. 2 is a longitudinal view of an impression cylinder cooperating with a sheet transfer drum.
  • FIG. 1 there is shown a two-color offset machine, in the side-walls 1 of the first of the two stages thereof, a plate cylinder 2, a rubber blanket cylinder 3 and an impression cylinder 4 are mounted.
  • the impression cylinder 4 is in gear-meshing engagement with sheet transfer drums 5 and 11, as can be concluded more readily from FIG. 2.
  • a motor M and a conventional gear transmission system noted generally by the reference numeral 25 drive the transfer drum 5.
  • the drum 5 with a set of grippers 6 serves for transferring an aligned or registered sheet from the sheet feed table 8 through the advance grippers 7.
  • the grippers 4 take over the sheet from the grippers 6 of the transfer drum 5, guide the sheet past the inked rubber blanket of the cylinder 3, and a set of grippers 9 of the transfer drum 11 take over the sheet and release it to the set of grippers 10 of the impression cylinder 12 in the second printing stage or mechanism.
  • a set of grippers or gripper bars 13 mounted on a rotating chain delivery system or conveyor 14, which advances the imprinted sheet in a conventional manner to a location at which it is stacked.
  • the line of contact between the plate cylinder 2 and the blanket cylinder 3 is identified by reference numeral 15.
  • the first printing stage or mechanism is provided with conventional moistening mechanism 16 and inking rollers 17.
  • the second printing stage or mechanism is similarly provided with moistening and inking rollers which are, however, not further identified in FIG. 1.
  • the cylinder 4, l2 and sheet transfer drums 5 and l 1 are provided with annular raceways or travel rings which are in mutual rolling engagement or in pressure contact.
  • Schmitz rings are provided on the cylinders 2 and 3 and can roll on one another in pressure contact, there can be no discussion of Schmitz rings with regard to annular raceways or travel rings on the transfer drums 5 and 1 1 since they have nothing to do with the pressure itself.
  • This travel ring is installed at the cylinders 4 and 12 and transfer drums 5 and l l with a slight difference in outer diameters of several hundredths of a millimeter.
  • every travel ring of the succeeding drums or cylinders is ground or polished so that its diameter is about 0.02 mm greater than that of the preceding one with which it is in pressure contact. This produces per rotation an additional frictional force directed toward the profiles of the gear teeth, whereby a backlash of 0.0628 mm arises when the tolerance maintained is 0.02 mm.
  • a change in location of the teeth profiles due to the impacts or shocks is thus counteracted by this further feature in addition to the rolling contact effected under pressure between the travel rings.
  • FIG. 2 shows the impression cylinder 4 as well as the transfer drum 11 in longitudinal view.
  • the cylinder 4 and drum 11 are mounted in the side walls 1 and 1'.
  • Travel rings 18 and 19, on the one hand, and 20. and 21, on the other hand, are firmly fastened with screws to both sides respectively of the impression cylinder 4 and the transfer drum 11.
  • Meshing gears 22 and 23 are securely mounted respectively on the shafts of the impression cylinder 4 and the transfer drum 1 l.
  • the gears 22 and 23, which as seen in FIG. 2 are matching, of equal pitch diameter, are located outside the frame walls of the printing press and travel through a non-illustrated lubricating oil bath.
  • Laterally adjustable support rings 24 are provided on the transfer drum 11 for supporting the imprinted sheet.
  • the support rings 24 are for the most part laterally adjustable so as to come into contact with only those margins or regions of the imprinted sheet that are free of print.
  • the critical location for the formation of the aforementioned doubling or mackling of the contours of an imprinted picture or the like is in the line of contact 15 between the plate cylinder 2 and the blanket cylinder 3.
  • the shocks and vibrations become increasingly greater, the faster the printing machine operates.
  • the disturbance has a special effect if the printing press is being operated without any Schmitz ring pressure being applied between the plate cylinder 2 and the rubber blanket cylinder 3. Many printers prefer operating without Schmitz ring pressure since such operation has the advantage of shortening the make-ready time.
  • an impression cylinder at least one sheet transfer drum disposed upstream of said impression cylinder in direction of feed of a sheet through the machine, means for driving said transfer drum so as to transfer a sheet from a given location to said impression cylinder, means cooperating with said impression cylinder for imprinting a sheet thereby, gripper means located at the peripheral surface of said impression cylinder for gripping the sheet being transferred by said sheet transfer drum and disposing it on said impression cylinder, and means connecting said transfer drum to said impression cylinder so that said impression cylinder is driven by said transfer drum, said driving means comprising a pair of parallel shafts on which said sheet transfer drum and said impression cylinder are mounted, respectively, and a pair of matching intermeshing end gears respectively carried by said shafts, said sheet transfer drum and said impression cylinder being provided with respective travel rings having a smooth surface of wear-resistant hardness, respectively, in pressure contact with one another, the travel ring of said driving transfer drum having a diameter at least about two hundredths of

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
US838090A 1968-07-06 1969-07-01 Frictional gear backlash eliminating means in sheet fed rotary printer Expired - Lifetime US3680481A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1761780A DE1761780C2 (de) 1968-07-06 1968-07-06 Bogenubergabetrommel an einer Bogen Rotationsdruckmaschine fur Buch oder Ofsetdruck

Publications (1)

Publication Number Publication Date
US3680481A true US3680481A (en) 1972-08-01

Family

ID=5696708

Family Applications (1)

Application Number Title Priority Date Filing Date
US838090A Expired - Lifetime US3680481A (en) 1968-07-06 1969-07-01 Frictional gear backlash eliminating means in sheet fed rotary printer

Country Status (9)

Country Link
US (1) US3680481A (de)
AT (1) AT297048B (de)
CH (1) CH477290A (de)
DE (1) DE1761780C2 (de)
DK (1) DK117236B (de)
FR (1) FR2012425A1 (de)
GB (1) GB1207789A (de)
NL (1) NL6906572A (de)
SE (1) SE357520B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491070A (en) * 1982-02-05 1985-01-01 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Rotary offset printing machine having a multi-image receiving blanket cylinder
US4605298A (en) * 1985-04-29 1986-08-12 Eastman Kodak Company Electrographic transfer roller drive mechanism
US20140020583A1 (en) * 2012-07-17 2014-01-23 Avi Barazani Adaptable impression drum

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7731209U1 (de) * 1977-10-08 1978-02-23 Maschinenfabrik Augsburg-Nuernberg Ag, 8900 Augsburg Schmitzring fuer rotationsdruckwerke
DE2835960C2 (de) * 1978-08-17 1983-11-10 Koenig & Bauer AG, 8700 Würzburg Einrichtung zum Dämpfen von Schwingungen im Zahnrad-Antriebsgetriebe von Rotationsdruckmaschinen
DE3131170C2 (de) * 1981-08-06 1983-11-10 Koenig & Bauer AG, 8700 Würzburg Offsetrollenrotationsdruckmaschine
DD209775A1 (de) * 1982-08-24 1984-05-23 Ulrich Hahn Einrichtung zur einstellung der zylinder in rotationsdruckmaschinen
DE3442662A1 (de) * 1984-11-23 1986-06-05 Albert-Frankenthal Ag, 6710 Frankenthal Farbwerk
DE3833245C1 (en) * 1988-09-30 1989-11-16 Man Roland Druckmaschinen Ag, 6050 Offenbach, De Drive for cylinders and drums transporting sheets
DE102004032112B4 (de) * 2004-07-02 2018-06-28 Koenig & Bauer Ag Rotationsdruckmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554904A (en) * 1946-05-25 1951-05-29 Harris Seybold Co Multicolor printing press
US2790385A (en) * 1953-05-14 1957-04-30 Druckmaschinenwerk Victoria Ve Cylinder mounting means for rotary sheet printing presses
US2940387A (en) * 1958-08-21 1960-06-14 Harris Intertype Corp Sheet delivery means for rotary printing press

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR991139A (fr) * 1944-04-03 1951-10-01 Marinoni Perfectionnement apporté aux machines à imprimer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554904A (en) * 1946-05-25 1951-05-29 Harris Seybold Co Multicolor printing press
US2790385A (en) * 1953-05-14 1957-04-30 Druckmaschinenwerk Victoria Ve Cylinder mounting means for rotary sheet printing presses
US2940387A (en) * 1958-08-21 1960-06-14 Harris Intertype Corp Sheet delivery means for rotary printing press

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491070A (en) * 1982-02-05 1985-01-01 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Rotary offset printing machine having a multi-image receiving blanket cylinder
US4605298A (en) * 1985-04-29 1986-08-12 Eastman Kodak Company Electrographic transfer roller drive mechanism
US20140020583A1 (en) * 2012-07-17 2014-01-23 Avi Barazani Adaptable impression drum

Also Published As

Publication number Publication date
SE357520B (de) 1973-07-02
AT297048B (de) 1972-03-10
GB1207789A (en) 1970-10-07
DE1761780C2 (de) 1973-11-22
CH477290A (de) 1969-08-31
DE1761780B1 (de) 1971-08-26
FR2012425A1 (de) 1970-03-20
NL6906572A (de) 1970-01-08
DK117236B (da) 1970-03-31

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