US3824925A - Printing mechanism with overdrive for the printing cylinder and inking rollers - Google Patents

Printing mechanism with overdrive for the printing cylinder and inking rollers Download PDF

Info

Publication number
US3824925A
US3824925A US00271871A US27187172A US3824925A US 3824925 A US3824925 A US 3824925A US 00271871 A US00271871 A US 00271871A US 27187172 A US27187172 A US 27187172A US 3824925 A US3824925 A US 3824925A
Authority
US
United States
Prior art keywords
printing
printing cylinder
cylinder
overdrive
inking
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 - Lifetime
Application number
US00271871A
Other languages
English (en)
Inventor
M Ebneter
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.)
FA RUESCH F MASCHINENFAB CH
RUESCH F MASCHF
Original Assignee
RUESCH F MASCHF
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by RUESCH F MASCHF filed Critical RUESCH F MASCHF
Application granted granted Critical
Publication of US3824925A publication Critical patent/US3824925A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B41F13/0008—Driving devices
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder

Definitions

  • a printing mechanism for a printing and punching machine of the type having stepwise advance of a web of paper to be printed or for sheet printing presses includes a printing cylinder which is adapted to be constantly rotated in the same rotary direction as it is transversely reciprocated back and forth across an impr'ession plate.
  • the drive for the printing cylinder comprises a motor driven eccentric crankshaft drive means, and mounted on the shaft of the printing cylinder is an overdrive mechanism for rotating the printing cylinder at a reduced speed as the cylinder reaches the end positions of its reciprocating stroke in order to ensure the constant rotation of the printing cylinder and its associated inking mechanism in order to obtain A the uniform transfer of ink from the inking rollers to the printing plate:
  • the present invention relates to a transfer printing mechanism for printing and punching machines of the type having stepwise feed, wherein the printing cylinder is provided with a printing plate over a part of its circumference, and is rolled against a flat impression plate during the stoppage of a web of paper or sheet and, after the rolling, the printing cylinder returns to the starting position while the next feed operation occurs.
  • the printing cylinder During its backward and forward movement the printing cylinder is turned continuously in the same di rection by means of two racks which are alternatively engaged via pawls, and during the return movement of the crank drive the printing plate is inked by an inking mechanism which is arranged above the printing cylinder.
  • the inking mechanism is driven from a crank drive via the printing cylinder.
  • the object of the present invention is to overcome the shortcomings of the prior art devices, and to provide a new and improved transfer printing mechanism in which the printing cylinder and, via it the associated inking I mechanism, are continued to be driven during a stoppage of the reciprocation and of the rotary movement of the cylinder and of the inking mechanism driven by it, which is caused by the crank drive.
  • the inking mechanism In order to avoid the stoppage of the inking mechanism it has already been proposed to drive it by a spetate the cylinder via a free wheel with linear speed as soon as the speed produced by the crank drive drops below said linear speed and which goes out of operation due to the free wheel when the speed (which rises and falls in the form of a sinusoidal curve) exceeds the linear speed.
  • the printing cylinder is developed in such a fashion that the printing plate extends lengthwise over half the circumference of the cylinder less the path which the rotary movement moves over during drive by the overdrive.
  • the stroke of the crank drive is preferably shortened as compared with an arrangement without overdrive by the distance which is required to move over the rotary movement of the printing cylinder effected by the overdrive.
  • the overdrive is preferably applied via a worm to a M drive gear of the printing cylinder which is connected cial drive during the stoppage of the printing cylinder,
  • the transfer printing mechanism of the present invention which has the inking mechanism driven by the printing cylinder and which is reciprocated from the main drive of the machine via an eccentric and a crank rod arranged on same, whereby the cylinder, which is rolled with gears along two fixed racks into which pawls alternately engage, is turned constantly in the same direction and in association with which there is provided on the machine main drive an overdrive which continues to roby two gears with the main drive shaft of the machine by which the eccentric of the crank drive is also driven.
  • an overriding clutch which disconnects the drive from the printing cylinder when the overdrive is driven by the crank drive via the worm with a speed which is higher than the uniformly constant speed of the overdrive.
  • the inking mechanism which is driven by the rotation of the printing mechanism is continued to be driven with reduced but constant speed shortly before and after the printing cylinder has reached the end position of the linear movement and of the speed dropping to O and rising from 0. In this way there is obtained a constantly uniform distribution of ink and transfer of ink to the printing plate.
  • the arrangement in accordance with the invention furthermore has the advantage that the gears of the printing cylinder and the pawls are assured very gently treatment since, upon the change of the linear movement of the cylinder, the pawls do not fall suddenly into position but rather catch up with the rotation of the gears with increasing speed of the crank drive and slowly slide into the teeth.
  • the accuracy of register is retained even after a long period of operation in view of the lack of wear. Rapid forward movement of the sprocket gear by sudden engagement of the pawls is avoided.
  • crank drive need rotate only 360 less the rotation effected by the overdrive, the stroke of the crank can be shortened. In this way there are obtained more favorable conditions of momentum which permit a lighter construction of the printing mechanism and of the drives.
  • FIG. 1 is a diagram of a known prior art transfer printing mechanism with crank drive
  • FIG. 2 is a diagram of the transfer printing mechanism of the present invention
  • FIG. 3 is a diagram of the subject printing mechanism directly before the start of the printing process
  • FIG. 4 is a diagram of the subject printing mechanism directly before the end of the printing process
  • FIG. 5 is a diagram, partially in section, showing the drive of the subject printing cylinder
  • FIG. 6 is a speed diagram.
  • the printing cylinder is recipro- 3 cated by a crank rod over the distance designated by the letter A, namely twice the distance from the point of support of the crank rod on the eccentric to its center.
  • the speed of the linear, and thus also of the rotary movement of the printing cylinder increases and decreases from to 0 in accordance with the sinusoidal curve shown in FIG. 6.
  • the rotation is produced for thesame distance as in FIG. 1, namely half a revolution of the cylinder (i.e., 180) while the linear movement of the printing cylinder covers only the distance A-x, namely the distance less the linear movement required by the rotary movement effected by the overdrive. Accordingly there is obtained a speed curve shown in FIG. 6 which is linear at the beginning and the end of the stroke, and
  • the transfer printing mechanism of the subject invention consists of a printing cylinder 1 having a printing plate 2 extending over a part of its circumference, an eccentric wheel 3, and a crank rod 4, along with an impression plate (not shown) on which a web of paper or a sheet is placed for printing.
  • a ratchet wheel 16 keyed thereon, as
  • the gears 17 and 18 are rotatably mounted on shaft 15. On thegears 17,, 18 there are provided pawls 19, 20, respectively. On the shaft there is also provided a gear 21 having overriding clutch24. The gear 21 is in engagement with the worm 22 which is slidably mounted on and guided in grooves on the shaft 23 of I the overdrive. In turn, shaft 23 is connected via gear 25 (see FIGS. 3 and 4) with the gear 26 of the main drive shaft 27 which is driven by the motor M. The drive shaft 27 drives the eccentric wheel 3 via gearing 28. As
  • pawl 20 is in connection with drive wheel 16, while pawl 19 is out of operation. It is noted that alternatively one pawl is in operation while the other pawl is not in contact with the wheel 16.
  • the wheel 16 is provided with recesses into which fall alternatively the pawls l9 and 20.
  • thev inkingmechanism whichconsists of a stationary ink fountain 8,' a doctor roller 9 and a vibrator roller 10 by which the ink is transferred from the fountain 8 to the distributing cylinder 11 which permits transverse distribution.
  • The'transfer roller 12 then applies the ink to the spreading rollers 13 and from the latter via the inking rollers 14 to the printing plate 2.
  • gear 17 which is in engagement with the rack 5 turns and, by means of the pawl 19, drives the ratchet wheel 16. In this way the printing cylinder 1 is rotated and the printing plate 2 rolled over the web of paper.
  • the printing plate 2 rolls over the stationary web of paper or sheet.
  • the inking mechanism moves, in combination with the rack 7, in the same direction.
  • the web of paper is pulled forward a further step below the rearward moving printing cylinder. No contact takes place between the printing cylinder and the web of paper since the protruding printing plate 2 of the printing cylinder 1 is located outside the vertical line to the web of paper.
  • the printing plate 2 is again inked by the inking rollers 14.
  • the printing cylinder 1 In order to prevent complete stoppage of the rotation of the printing cylinder 1 when the corresponding end position of the linear movement is reached, the printing cylinder 1, shortly before completion of the printing process and the reduction in speed of the linear and rotary motion taking place thereby, is turned further via the gear 21 by the worm 22 of the overdrive with a reduced but constant speed, as a result of which the rollers of the inking mechanism are also uniformly'turned further.
  • a transfer printing mechanism for a printing and punching machine having step-wise advance of a web of paper to be printed or for sheet printing presses comprising:
  • a printing cylinder mounted on a shaft for rotary and reciprocating movement relative to a stationary impression plate
  • said driving means including:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
US00271871A 1972-04-21 1972-07-14 Printing mechanism with overdrive for the printing cylinder and inking rollers Expired - Lifetime US3824925A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2219534A DE2219534C3 (de) 1972-04-21 1972-04-21 Antrieb eines Überrolldruckwerkes

Publications (1)

Publication Number Publication Date
US3824925A true US3824925A (en) 1974-07-23

Family

ID=5842799

Family Applications (1)

Application Number Title Priority Date Filing Date
US00271871A Expired - Lifetime US3824925A (en) 1972-04-21 1972-07-14 Printing mechanism with overdrive for the printing cylinder and inking rollers

Country Status (11)

Country Link
US (1) US3824925A (de)
JP (1) JPS5714993B2 (de)
BE (1) BE786185A (de)
CH (1) CH543392A (de)
DE (1) DE2219534C3 (de)
DK (1) DK136139C (de)
FR (1) FR2181263A5 (de)
GB (1) GB1397761A (de)
IT (1) IT955338B (de)
NL (1) NL173035C (de)
SE (1) SE386109B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101301810B (zh) * 2008-06-12 2011-06-29 玉环县艾捷尔精密仪器有限公司 油墨印刷适性仪的匀墨辊驱动机构
CN115071251A (zh) * 2022-05-27 2022-09-20 秦彪 一种eva泡棉垫表面印标装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT337732B (de) * 1974-11-22 1977-07-11 Melzer Ohg Maschf Druckwerk

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US131702A (en) * 1872-09-24 In printing-presses
US1999472A (en) * 1932-10-01 1935-04-30 Nixon Ernest George Web-fed printing machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE283027C (de) *

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US131702A (en) * 1872-09-24 In printing-presses
US1999472A (en) * 1932-10-01 1935-04-30 Nixon Ernest George Web-fed printing machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101301810B (zh) * 2008-06-12 2011-06-29 玉环县艾捷尔精密仪器有限公司 油墨印刷适性仪的匀墨辊驱动机构
CN115071251A (zh) * 2022-05-27 2022-09-20 秦彪 一种eva泡棉垫表面印标装置
CN115071251B (zh) * 2022-05-27 2024-02-23 深圳市海富星科技有限公司 一种eva泡棉垫表面印标装置

Also Published As

Publication number Publication date
IT955338B (it) 1973-09-29
GB1397761A (en) 1975-06-18
NL173035B (nl) 1983-07-01
DE2219534A1 (de) 1973-10-25
DK136139B (da) 1977-08-22
DK136139C (da) 1978-01-30
JPS4921208A (de) 1974-02-25
NL173035C (nl) 1983-12-01
DE2219534C3 (de) 1978-11-09
FR2181263A5 (de) 1973-11-30
DE2219534B2 (de) 1978-03-16
NL7206050A (de) 1973-10-23
JPS5714993B2 (de) 1982-03-27
SE386109B (sv) 1976-08-02
BE786185A (fr) 1973-01-12
CH543392A (de) 1973-10-31

Similar Documents

Publication Publication Date Title
US3824925A (en) Printing mechanism with overdrive for the printing cylinder and inking rollers
US4024812A (en) Removable numbering and imprinting device for sheet-fed offset machines
GB1426263A (en) Printing machines
US2017010A (en) Printing press
US2066429A (en) Apparatus for operating cylinder printing presses
GB950229A (en) Improvements in or relating to printing presses
US3164088A (en) Machine for printing on sheets including expansible sheets such as textiles
US502618A (en) Inking apparatus for printing presses
US2924172A (en) Driving arrangement for the impression cylinder printing press
GB313431A (en) Improvements in means for converting rotary motion into reciprocating motion
US4796530A (en) Oscillating roll for printing presses
US2896538A (en) Operating means for bed-and-cylinder printing press
US1592123A (en) Ribbon-printing attachment for presses
US652113A (en) Inking apparatus.
US1022406A (en) Printing-press.
US2207460A (en) Printing press
US2386962A (en) Printing machine
US291521A (en) Printing-machine
US589613A (en) Printing-machine
US562714A (en) Arthur e
US1269327A (en) Printing-machine.
US818699A (en) Combined printing and cutting machine.
US2841081A (en) Inking mechanism for high-speed cylinder printing presses
US9234A (en) Improvement in printing-presses
US1069139A (en) Printing-press.