US3421757A - Retarding device for the delivery end of a printing machine - Google Patents

Retarding device for the delivery end of a printing machine Download PDF

Info

Publication number
US3421757A
US3421757A US648323A US3421757DA US3421757A US 3421757 A US3421757 A US 3421757A US 648323 A US648323 A US 648323A US 3421757D A US3421757D A US 3421757DA US 3421757 A US3421757 A US 3421757A
Authority
US
United States
Prior art keywords
cylinder
retarding
sheets
sections
retarding device
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
US648323A
Other languages
English (en)
Inventor
Lucien Boisseau
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.)
CREUSOT FORGES ATELIERS
FORGES ET ATELIERS DU CREUSOT SOC
Original Assignee
CREUSOT FORGES ATELIERS
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 CREUSOT FORGES ATELIERS filed Critical CREUSOT FORGES ATELIERS
Application granted granted Critical
Publication of US3421757A publication Critical patent/US3421757A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance

Definitions

  • a retarding device for the delivery end of a printing machine for printing a flexible material such as paper in the form of a web or web-portion comprising, upstream of a take-off station for sheets or sections of sheets, a rotary take-up cylinder having retractable means for entraining the sections or sheets by their forward portions.
  • This cylinder has at least one retarding element rotated in the opposite direction from the cylinder and projecting periodically outside the cylinder periphery, in a predetermined angular position of the cylinder, and this retarding element co-operates in this angular position of the cylinder, with a rotary roller outside the cylinder, to retain the sections or sheets by their trailing portions.
  • the invention relates to a retarding device for the delivery end of a printing machine.
  • printed sheets, or the sections formed by cutting and folding the printed sheets are usually retarded by transferring them from one rotary cylinder to another with a lower peripheral speed.
  • This retarding method may involve transfers to a third or even a fourth cylinder, the last retarding step being carried out by means of a drum into which the sections or sheets are projected by the last retarding cylinder and from which they are extracted and released onto a machine delivery table.
  • a disadvantage of using a plurality of retarding cylinders is that the resulting device is bulky and expensive.
  • the object of the invention is to provide a retarding device in which a single retarding cylinder gives step down ratios at least twice the usual ratios between successive retarding cylinders, without risk of crumpling or tearing.
  • the retarding device has, before a take-off station for sheets or sections of sheets, a rotary take-up cylinder having retractable means for entraining the forward portions of the sections or sheets, this cylinder has at least one retarding element rotated in the opposite direction from the cylinder and projecting periodically outside the cylinder periphery near and downstream of the trailing edge of the sections or sheets, in a predetermined angular position of the cylinder, and this retarding element cooperates in this angular position of the cylinder with a rotary cooperating roller which is outside the cylinder and whose peripheral speed is equal to 3,421,757 Patented Jan. 14, 1969 "ice the residual tangential speed of the retarding element, to retain the trailing portion of the sections or sheets at this resultant tangential speed.
  • a retarding device embodying the invention is shown diagrammatically in the accompanying drawings and will now be described, by way of example only.
  • FIGURES 1, 2 and 3 show the retarding device diagrammatically in three. successive positions, illustrating the begining of a retarding action, the retarding period and the end of the retarding action;
  • FIGURE 4 is a transverse section on a larger scale through a cooperating roller.
  • the retarding device has a take-up cylinder 1 with retractable spikes 2 for entraining the front portions of sections 3. These spikes are controlled by known means (not shown).
  • the cylinder 1 carries two retaining elements consisting of bars 4 mounted on two axes 5 parallel to the axis 6 of the cylinder and diametrically opposite each other relative to this axis.
  • the bars 4 are constantly rotated in the opposite direction from the cylinder 1 by planet gears 7 engaging a stationary sun gear 8, and by gears 9 keyed on the bars 4.
  • Each bar 4 has a portion with a rounded outline 4a or a plurality of fingers forming such an outline, which, with each revolution of the bar project a distance d outside the periphery of the cylinder 1, through openings 1a.
  • the step-up ratio is such that each of the two bars 4 carries out a whole number of turns about its axis 5 for each revolution of the cylinder 1. In the embodiment shown, with two bars 4, each of these bars turns twice about its axis 5.
  • Suitable selection of the distance E between the axes 5, 6 and of the eccentricity D of the rounded portions 4a relative to the pivot 5 gives at the top of these rounded portions-in their plane of alignment XX with the axes 5, 6 (FIGURE 2)--a resultant tangential speed Va lower than the tangential speed Vb on the periphery of the cylinder 1, in a predetermined ratio such as 2:5, for example.
  • a co-operating roller 10 rotated in the opposite direction from the cylinder 1 and having push rods 11 supported on springs 12 (FIG- URE 4).
  • the step-up ratio between the cylinder 1 and roller 10 is such that the tangential speed at the free end of the push-rod 11 is equal to the resultant tangential speed Va.
  • Another section 3 is already engaged between the bar 4 and roller 10 and is being released by other spikes 2.
  • the trailing end of this section, hitherto entrained at the peripheral speed Vb of the cylinder 1, is then gripped near the plane XX by the rounded portion 4a and by the push-rod 11 of the roller 10 (FIGURE 2), and its speed is brought to value Va which will be its delivery speed (FIGURE 3) as it approaches the take-off station or possibly a takeoff drum (not shown).
  • the retaining action exerted on the trailing portion of the section keeps the section taut and prevents it from crumbling when released. Since the rotating action does not occur until after the spikes release the section, there is no risk of tearing being caused by the spikes.
  • the retarding device just described can be modified and any useful accessory may be added to it without exceeding the scope of the invention.
  • the take-up cylinder may be adapted to take up a larger number of sections or sheets and carry a larger number of rotary retaining elements, associated with a single cooperating roller or with two co-operating retaining rollers acting alternately.
  • the retarding element instead of having one portion projecting periodically from the takeup cylinder, could be a cylinder whose periphery constantly projects.
  • a retarding device for the delivery end of printing machines for printing a flexible material such as paper in the form of a web or web portion characterised in that it has, before a take-01f station for sheets or sections of sheets, a rotary take-up cylinder having retractable means for entraining the forward portions of the sections or sheets, this cylinder has at least one retarding element rotated in the opposite direction from the cylinder and projecting periodically outside the cylinder periphery near and downstream of the trailing edge of the sections or sheets, in a predetermined angular position of the cylinder, a rotary cooperating roller, and this retarding element co-operates in this angular position of the cylinder with said rotary co-operating roller which is outside the cylinder and whose peripheral speed isequal to the residual tangential speed of the retarding element, to retain the trailing portion of the sections or sheets at this tangential speed.
  • each of the retarding elements carried by the cylinder is inside the cylinder and is rotated about an axis parallel to the cylinder axis by means of a planet gear carried by the cylinder and engaging continuously with a fixed gear coaxial with the cylinder.
  • a retarding device as claimed in claim 1 characterised in that on each of the retarding elements carried by the cylinder an eccentric portion periodically projecting outside the cylinder periphery has a rounded outline whose generatrices are parallel to that of the cylinder.
  • a retarding device as claimed in claim 1 characterised in that on said rotary co-operating roller outside the cylinder the retaining element which cooperates with the retarding elements carried by the cylinder to retain the trailing portion of the sections or sheets is subject to a resilient member which urges it to bear on the sections or sheets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
US648323A 1966-06-28 1967-06-23 Retarding device for the delivery end of a printing machine Expired - Lifetime US3421757A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR67253A FR1492187A (fr) 1966-06-28 1966-06-28 Dispositif ralentisseur de sortie, pour machines à imprimer

Publications (1)

Publication Number Publication Date
US3421757A true US3421757A (en) 1969-01-14

Family

ID=8611974

Family Applications (1)

Application Number Title Priority Date Filing Date
US648323A Expired - Lifetime US3421757A (en) 1966-06-28 1967-06-23 Retarding device for the delivery end of a printing machine

Country Status (7)

Country Link
US (1) US3421757A (fr)
CH (1) CH454177A (fr)
DE (1) DE1561054B2 (fr)
DK (1) DK124940B (fr)
FR (1) FR1492187A (fr)
GB (1) GB1161618A (fr)
SE (1) SE319193B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3679201A (en) * 1971-02-02 1972-07-25 Polygraph Leipzig Collecting device especially for transverse folders for web-fed rotary printing presses
US3991999A (en) * 1975-09-04 1976-11-16 Xerox Corporation Revolving stripper finger
US4600186A (en) * 1983-02-21 1986-07-15 Maschinenfabrik Wifag Method and apparatus for reducing the impact speed of a printed product which is delivered to a fly pocket of a fly delivery wheel in a rotary printing press
EP0708044A3 (fr) * 1994-10-17 1997-01-02 Am Int Appareil de manipulation de feuilles
US20060113726A1 (en) * 2004-11-05 2006-06-01 Bdt Ag Sheet conveyor for conveying individual sheets

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407576C2 (de) * 1974-02-16 1982-03-18 Albert-Frankenthal Ag, 6710 Frankenthal Arbeitsverfahren zum Verlangsamen von Druckprodukten
DE2541502C3 (de) * 1975-09-17 1983-12-08 Albert-Frankenthal Ag, 6710 Frankenthal Einrichtung zum Verlangsamen der aus dem Falzapparat einer Rotationsdruckmaschine in das Ablegeschaufelrad abzulegenden Druckexemplare
DD264190A1 (de) * 1987-09-04 1989-01-25 Polygraph Leipzig Schaufelradausleger zur schuppenauslage von druckprodukten
FR2654981B1 (fr) * 1989-11-28 1995-06-16 Marinoni Harris Sa Plieuse d'imprimerie.
DE4123399A1 (de) * 1991-07-15 1993-01-21 Windmoeller & Hoelscher Vorrichtung zum sammeln oder stapeln von flachen werkstuecken auf einem stapeltisch
GB0505010D0 (en) * 2005-03-11 2005-04-20 Quin Systems Ltd Intermittent drive systems

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2067565A (en) * 1933-12-27 1937-01-12 Hoe & Co R Delivery mechanism for printing machine folders

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2067565A (en) * 1933-12-27 1937-01-12 Hoe & Co R Delivery mechanism for printing machine folders

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3679201A (en) * 1971-02-02 1972-07-25 Polygraph Leipzig Collecting device especially for transverse folders for web-fed rotary printing presses
US3991999A (en) * 1975-09-04 1976-11-16 Xerox Corporation Revolving stripper finger
US4600186A (en) * 1983-02-21 1986-07-15 Maschinenfabrik Wifag Method and apparatus for reducing the impact speed of a printed product which is delivered to a fly pocket of a fly delivery wheel in a rotary printing press
EP0708044A3 (fr) * 1994-10-17 1997-01-02 Am Int Appareil de manipulation de feuilles
US20060113726A1 (en) * 2004-11-05 2006-06-01 Bdt Ag Sheet conveyor for conveying individual sheets
US7533883B2 (en) * 2004-11-05 2009-05-19 Bdt Ag Sheet conveyor for conveying individual sheets

Also Published As

Publication number Publication date
FR1492187A (fr) 1967-08-18
CH454177A (fr) 1968-04-15
DE1561054B2 (de) 1973-05-10
DK124940B (da) 1972-12-11
GB1161618A (en) 1969-08-13
DE1561054A1 (de) 1972-01-20
SE319193B (fr) 1970-01-12

Similar Documents

Publication Publication Date Title
US3421757A (en) Retarding device for the delivery end of a printing machine
EP0420297A1 (fr) Traitement de bandes en papier ou similaires
US3540723A (en) Gear folder for rotary presses
EP0114352B1 (fr) Dispositif pour éviter la formation de cornes dans une plieuse
US3899946A (en) Device for the print-referenced cutting of a printed web
US1545912A (en) Feeding and stacking method and machine
US2714268A (en) Foil feeding mechanism for rotary blocking machines
US4905981A (en) Apparatus for changing the position of printed products arranged in an imbricated formation
US3947013A (en) Method of zig-zag folding and apparatus therefor
US3685820A (en) Printing press folders
US4493690A (en) Cam activated anti-dog-ear device
RU2758611C1 (ru) Устройство разматывания ленты и машина тиснения элементов в виде листов
GB1578296A (en) Apparatus for the continuous folding of a flexible sheet into a substantially zigzag form
EP0001962B1 (fr) Appareil pour plier une feuille de matériau d'un angle de 180 degrés
US3337211A (en) Apparatus for continuously folding and cutting off web material
US2791425A (en) Sheet feeding means
US2754118A (en) Method of and means for registering and transferring lapped sheets
US1962128A (en) Sheet cutting and printing machine
GB1032425A (en) Article collating apparatus
US2574941A (en) Conveyer belt printing machine with multiple impression
US1217650A (en) Feeding mechanism.
US2967479A (en) Web feeding and control device for printing machines
JPH02221063A (ja) 折機のガイドブラシ装置
US2026515A (en) Cutting, folding, and associating mechanism for printing machines
US2280663A (en) Rotary conveying mechanism for conveying the products of printing machines