US3809387A - Apparatus for the automatic folding and creasing of sheet material - Google Patents

Apparatus for the automatic folding and creasing of sheet material Download PDF

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Publication number
US3809387A
US3809387A US00245922A US24592272A US3809387A US 3809387 A US3809387 A US 3809387A US 00245922 A US00245922 A US 00245922A US 24592272 A US24592272 A US 24592272A US 3809387 A US3809387 A US 3809387A
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United States
Prior art keywords
drum
sheet
rollers
creasing
feed
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
US00245922A
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English (en)
Inventor
H Heist
D Silbereisen
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.)
Kalle GmbH and Co KG
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Kalle GmbH and Co KG
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Filing date
Publication date
Priority claimed from DE19712119372 external-priority patent/DE2119372C3/de
Application filed by Kalle GmbH and Co KG filed Critical Kalle GmbH and Co KG
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Publication of US3809387A publication Critical patent/US3809387A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/20—Zig-zag folders

Definitions

  • ABSTRACT This invention relates to an apparatus for folding and creasing a sheet of material, comprising rotatable drum means for receiving said sheet on its periphery,
  • control means actuated by said scanning element, to stop the drum, so to pivot the feed rollers that one of them whose surface adjacent the drum has been rotating in the opposite direction to the drum now makes driving contact with the drum to drive it in the said opposite direction, whereby the material is folded and passes for creasing between the driving feed roller and the drum means, and then so to pivot the 7 feed rollers that the other of them drives the drum in its original direction whereby 'the material is again folded and passes for further creasing between the now driving feed roller and the drum.
  • This invention relates to an apparatus for the automatic folding and creasing of sheet material, whereby the material can be provided with a plurality of sharpedged parallel creases at any required intervalsQ
  • the material is passed between two rollers which rotate in opposite directions and which have contoured fold-forming portions at certain distances apart.
  • Such apparatus permits creases to be formed in a material only at particular constant intervals.
  • two push-pull levers carrying feed strips are used for forming the folds, these feed strips intermittently drawing the material into the apparatus at time intervals determined by the required distance between creases, and clamping the material in the extreme lever positions, so that a crease is formed. Creases located at constant distances apart are ob tained with such apparatus. Although it is possible to ⁇ form creases at differing intervals in different sheets, it is not, however, possible to form creases at irregular intervals in a sheet,.using one and the same apparatus.
  • the presentinvention provides an apparatus for folding and creasing a sheet of material, the apparatus including a rotatable drum for receiving the sheet on its periphery, a pair of drivable nip rollers on axes parallel to the drum axis, for feeding the sheet onto the drum while the latter is being rotated, the rollers being pivotal parallel to their axes to bring each, one at a time, into driving contact with the drum, a scanning element for the leading edge of the material on the drum and control means, actuated by the scanning element, to stop the drum, so to pivot the feed rollers that one of them whose surface adjacent the drum has been-rotating in the opposite direction to the drum now makes driving contact with the drum to drive it in the opposite direction, whereby the material is folded and passes for creasing between the driving feed roller and the .drum, and then so to pivot thefeed rollers that the other of them drives the drum in its original direction whereby thematerial is again folded and passes for further creasing between the now driving feed roller and the drum.
  • This apparatus enables creases to. be formed at variable intervals along the sheet and renders it possible to v '2 obtain standard folds in accordance with Specification DIN 824, for instance, in sheets of different using one and the same machine.
  • the apparatus is also suitable for forming creases at constant intervals.
  • The. pair of feed rollers may be pivoted on an axis which is located midway between the axes of rotation of the rollers. By their pivoting movement, the two feed rollers alternatively are brought into driving contact with the drum. Since the two rollers rotate in opposite directions, their alternate movement into contact with the drum results in reversal of the direction in which the drum rotates. Each time the direction of rotation is changed, a crease is formed in the material, since the part of parts of the material already on the drum and the part passing through the pair of feed rollers are both or all overridden by the driving feed roller.
  • the scanning element disposed in the path of travel of the material may be a mechanical switch, e.g. a micro-switch, or a photo-electric switch, e.g. a photoelectric cell.
  • the scanning element is preferably so disposed in the path of travel of the material that it is actuated by the forward edge of the material when the first fold is to be formed. If the scanning-element is so arranged that it is actuated at an earlier stage, a timedelay element must .be connected between the switching element and the control device.
  • the distance between the leading edge of the material and the first fold is the same for all sizes of material.
  • the distance between the leading edge of the material and the first fold must be variable depending upon the particular constant interval between folds that is required.
  • a'scanning element theposition of which can be adjusted, or of a plurality of individually selectable scanning elements.
  • the control operation for pivoting the pair of feed rollers can be carried out mechanically or electromechanically.
  • the control device preferably consists of electronic timing elements.
  • Each timing element consists of a plurality of timing stages.
  • the pair of feed rollers is pivoted at the commencement of each timing stage and, as described above, the material is provided with a new fold.
  • the last timing stage determines the end of the folding and creasing operation.
  • Each timing element is adapted for the forming of standard folds in one size of material, e.g. one timing element is used for forming folds in a DIN A0 sheet in accordance with Specification DIN 824.
  • a DIN AO sheet is specifically disclosed in FIG. 1 of U.S. Pat. No. 3241.82 and a afqtmat t itx.1.1.89mm closed in column 2, lines 58 and 59 of the aforementioned U.S. patent.
  • the associated timing elements cannot comprise a specific last timing stage which terminates the folding operation, since it is not known where the material ends.
  • a further scanning element which responds to the passing of the trailing edge of the material is then arranged in the path of travel of the material. As soon as this scanning element is cleared by the trailing edge of the material, it acts upon the timing element sizes and the timing element.
  • A. guide track may be provided for the folded material discharged atone of the sides of the drum, the material slidingalong this track and into a receiving bin.
  • a second guide track may be provided for folded materiaI discharged at theother side of the drum, this track being so disposed that the folded material falls off it onto the other guide track and from there slides into the receivingbin.
  • FIG. 1 is a cross-section through the apparatus
  • FIG. 3 shows the position of material being folded, in various stages of the folding operation
  • FIG. 6 is a block circuit diagram of the control means of the apparatus. v
  • FIG. 1 the housing of the apparatus is designated by the numeral 1.
  • the path of travel of the sheet over the drum 7 is confined either by a guide roller 8 and a pressure roller 9 or by a guide roller 1,0 and a pressure roller 11, depending upon the direction in which the drum is rotating.
  • the folded and creasedsheet 2 After completion of the folding and creasing operations, the folded and creasedsheet 2, depending upon the dire- 4 tion in which the drum 7 is rotating when the last fold is formed, either passes over a guide track 12 into a receiving bin l3,"or slides over a guide track 14 on to the guide track 12 and from there into the receiving bin 13.
  • Two photo-electric cells 15 and 16 are disposed in the path of travel of the sheet 2 and close photoelectric the downstream side of the pressure roller 9; these photoelectri cells respond to the presence of the leading edge of the sheet and are individually selectable depending upon the required distance between the leading edge of the sheet and the first fold.
  • Located upstream of the two feed rollers 5 and 6 is a further photo-electric cell 17 which responds to the passing of the trailing edge of the sheet.
  • the two feed rollers 5 and 6 are mounted in a support 18 (FIG. 2) and are driven at a constant peripheral speed by a motor 19 by way of a clutch 20, a chain 21, a sprocket 22 and gear wheels 23 and, 24 see FIG. 5).
  • the two feed rollers 5 and 6 are held by a magnet 25in an initial position slightly inclined to the horizontal (see FIG. 4).
  • the roller 6 is in contact with the drum 7 and drives it (see FIG. 5), whereas when the rollers are in the positions 5" and 6", the roller 5 drives the drum 7 (see FIG. 2).
  • FIG. 6 shows a block circuit diagram for the initial position of the apparatus, i.e. when the apparatus is started up by means of a main switch S 38, but before the leading edge of the sheet 2 has reached the photoelectric cells 15 andl6.
  • a main switch S 38 When the sheet 2 is fed in, one of a series of switches S 39a to S 39f is actuated by the machine operator and thus one of a series of timingelemerits 40a to 40f of a control means 40 is selected.
  • the sheet 2 is to be folded and creased in an standard manner, e.g. in accordance with German Standard Specification DIN 824, then, depending upon its shape, one of the timing elements 40a to 40d isselected.
  • Each of the timing elements 40a to 40f comprises 1 to n timing stages. Each timing stage controls the next.
  • timing element 40e or 40f sends a pulse to the timing element 40e or 40f.
  • This pulse causes the timing stage, operating up to the moment at which the pulse is sent, and also the next timing stage also operated by the aforementioned timing stage, to continue to be operative, but no further timing stage is actuated.
  • each timing element 40a to 40f actuates a wiping contact relay 41, which returns the apparatus to its initial position.
  • the switch S 39a is actuated by the operator. This selects the timing element 40a and brings the photo-electric cell 15 into action.
  • the apparatus is in the initial position in which neither of the two feed rollers and 6 is in contact with the drum 7, and in which the pressureroller 9 is lifted from the drum 7. This position is shown in FIG. 2 in solid lines.
  • the drum 7 is driven by its motor 31 in the direction indicated in FIG. 2 by the solid line arrow.
  • the switches S 42a to S 420 are opened and the motor 31 driving the drum 7 is thereby stopped, the clutch 34-for the drum 7 is disengaged, and the magnet 25 is de-energized. Since the switch 42d'is closed, the magnet 35 is energized and the pressure roller 9 is thus brought into the position 9'.
  • the switch S 42e is closed and, since the switches S 29 and S 30 are also closed, a relay 43 pulls up so that a switch S 43 is lifted from a contact 44 and applied to a contact 45, i.e. a brake 46 for the feed rollers and a drum brake 47 are energized, and the feed-roller clutch 'is disengaged.
  • the switches S 42f to S 421 are closed, so that connections between the switches S 39a to S 39f on the one hand and the respective associated timing elements 40a to 40f on the other are established.
  • the first timing stage of the pre-selected timing element in thiscase the first timing stage of the timing element 40a, is charged.
  • the magnet 27 is energized by the first timing stage, so that the two feed rollers 5 and 6 are pivoted about the axis 28 into the positions 5' and 6', in which the roller 6 is in contact with the drum 7, and drives this in the direction indicated by the broken-line arrow.
  • the guide rollers 8 and 10 and the pressure rollers 9 and 11- are driven by the drum 7 in the direction of the broken-line arrows (see FIG. 2).
  • That part of the sheet 2 already on the drum 7 is at this time in the position shown in FIG. 3b and is likewise moved in the other direction by reversal of the rotation of the drum 7.
  • This part of the sheet 2 and also the fresh part passing through the two feed rollers 5 and 6 are overridden by the roller 6 (see FIG. 3b), and the first crease is formed.
  • the first timing stage of the timing element 40a actuates the second timing stage-After the first timing stage has been completed, that part of the sheet 2 that is travelling over the drum 7 occupies the position shown in FIG. 3c.
  • the magnet 27 is de-energized so that the switch S 29 is closed.
  • the magnet 26 is energized..
  • the switch S 30 remains closed. Since all three switches S 29, S '30 and S 42e remain closed for a brief period, the relay 43 is pulled up and the switch S 43 is moved from the contact 44 and applied to the contact 45, so that the feed-roller brake 46 and the drum brake 47 pull up, while the-feed-roller I clutch 20 is disengaged.
  • control means comprises at least one electronic timing element.
  • An' apparatus as claimed in claim 1 including means for discharging folded and creased sheets from both sides of the drum and for conveying discharged sheets to a single receiving bin, the arrangement being such that from whichever side of the drum the sheet is discharged, it arrives in the bin in the same orientation.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
US00245922A 1971-04-22 1972-04-20 Apparatus for the automatic folding and creasing of sheet material Expired - Lifetime US3809387A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712119372 DE2119372C3 (de) 1971-04-22 Vorrichtung zum automatischen Falten von Blattmaterial

Publications (1)

Publication Number Publication Date
US3809387A true US3809387A (en) 1974-05-07

Family

ID=5805384

Family Applications (1)

Application Number Title Priority Date Filing Date
US00245922A Expired - Lifetime US3809387A (en) 1971-04-22 1972-04-20 Apparatus for the automatic folding and creasing of sheet material

Country Status (8)

Country Link
US (1) US3809387A (it)
BE (1) BE782427A (it)
CH (1) CH539570A (it)
FR (1) FR2186943A5 (it)
GB (1) GB1380959A (it)
IT (1) IT952727B (it)
NL (1) NL7204879A (it)
SE (1) SE373105B (it)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4723488A (en) * 1985-09-04 1988-02-09 Toray Industries, Inc. Apparatus for intermittently feeding continuous paper in a printing press
US5749823A (en) * 1995-03-28 1998-05-12 Heidelberger Druckmaschinen Ag Signature control in a high speed printing press
US20050037908A1 (en) * 2003-08-15 2005-02-17 Xerox Corporation Booklet maker with crease rolls having a slip clutch
US6935998B2 (en) * 2000-12-20 2005-08-30 Goss International Americas, Inc. Method and device for determining the accuracy of a fold position
US8506465B2 (en) 2006-04-07 2013-08-13 Oce-Technologies B.V. Method and an apparatus for folding a medium

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2854233A (en) * 1956-06-19 1958-09-30 Lawrence H Groeper Paper folding machine
US2947536A (en) * 1957-06-03 1960-08-02 Iliff H Martin Paper folding device
US3241829A (en) * 1963-05-03 1966-03-22 Acher Heinz Device for folding sheets or foils of paper or the like
US3363896A (en) * 1965-08-04 1968-01-16 Thomas W. Mckindary Methods and apparatus for zig-zag folding a web
US3466027A (en) * 1967-09-07 1969-09-09 Us Army Paper folding machine
US3697062A (en) * 1968-12-04 1972-10-10 Harri Mones Machine for the zigzag folding of sheets
US3712610A (en) * 1971-09-02 1973-01-23 V Garrone Automatic pleating machines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2854233A (en) * 1956-06-19 1958-09-30 Lawrence H Groeper Paper folding machine
US2947536A (en) * 1957-06-03 1960-08-02 Iliff H Martin Paper folding device
US3241829A (en) * 1963-05-03 1966-03-22 Acher Heinz Device for folding sheets or foils of paper or the like
US3363896A (en) * 1965-08-04 1968-01-16 Thomas W. Mckindary Methods and apparatus for zig-zag folding a web
US3466027A (en) * 1967-09-07 1969-09-09 Us Army Paper folding machine
US3697062A (en) * 1968-12-04 1972-10-10 Harri Mones Machine for the zigzag folding of sheets
US3712610A (en) * 1971-09-02 1973-01-23 V Garrone Automatic pleating machines

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4723488A (en) * 1985-09-04 1988-02-09 Toray Industries, Inc. Apparatus for intermittently feeding continuous paper in a printing press
US5749823A (en) * 1995-03-28 1998-05-12 Heidelberger Druckmaschinen Ag Signature control in a high speed printing press
US6935998B2 (en) * 2000-12-20 2005-08-30 Goss International Americas, Inc. Method and device for determining the accuracy of a fold position
US20050037908A1 (en) * 2003-08-15 2005-02-17 Xerox Corporation Booklet maker with crease rolls having a slip clutch
US6981938B2 (en) * 2003-08-15 2006-01-03 Xerox Corporation Booklet maker with crease rolls having a slip clutch
US8506465B2 (en) 2006-04-07 2013-08-13 Oce-Technologies B.V. Method and an apparatus for folding a medium

Also Published As

Publication number Publication date
DE2119372A1 (de) 1972-11-02
NL7204879A (it) 1972-10-24
DE2119372B2 (de) 1977-07-07
IT952727B (it) 1973-07-30
SE373105B (it) 1975-01-27
GB1380959A (en) 1975-01-22
CH539570A (de) 1973-07-31
BE782427A (fr) 1972-10-20
FR2186943A5 (it) 1974-01-11

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