US3589709A - Control apparatus for the measurement and folding of flat workpieces - Google Patents

Control apparatus for the measurement and folding of flat workpieces Download PDF

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Publication number
US3589709A
US3589709A US734654A US3589709DA US3589709A US 3589709 A US3589709 A US 3589709A US 734654 A US734654 A US 734654A US 3589709D A US3589709D A US 3589709DA US 3589709 A US3589709 A US 3589709A
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United States
Prior art keywords
workpiece
memory store
folding
capacitor
signal
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Expired - Lifetime
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US734654A
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English (en)
Inventor
David Hey
Goeffrey Luther Grimwood
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Thomas Broadbent and Sons Ltd
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Thomas Broadbent and Sons Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B11/043—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S493/00—Manufacturing container or tube from paper; or other manufacturing from a sheet or web
    • Y10S493/937—Textile

Definitions

  • a control apparatus for use with a machine for folding a flat workpiece comprising a first detector and transmitter unit arranged to detect and measure a dimension of a travelling workpiece and transmit a signal whose value is representative of said dimension to a first memory store arranged to accept said signal, means for transferring at least part of said signal in the first memory store from said first store to a second memory store, and a second transmitter arranged to transmit to said second memory store a further and cumulative signal representative of the passage of said workpiece relative to a folding station, said second memory store being arranged to initiate a folding operation when the required length of workpiece has passed said folding station.
  • a control apparatus for use with a machine for folding a flat workpiece comprises a first detector and transmitter unit arranged to detect and measure a dimension of a travelling workpiece and transmit a signal whose value is representative of said dimension to a first memory store arranged to accept said signal, means for transferring at least part of said signal in the first memory store from said first store to a second memory store, and a second transmitter arranged to transmit to said second memory store a further and cumulative signal representative of the passage of said workpiece relative to a folding station, said second memory store being arranged to initiate a folding operation when the required length of workpiece has passed said folding station.
  • each of the first and second memory stores is an electronic circuit and comprises at least one storage capacitor, each storage capacitor being connected to its associated transmitter through a resistance, the arrangement thus forming a resistance-capacitor circuit.
  • the means for transferring at least part of the signal originally stored in the first memory store to the second memory store may comprise a switch, arranged when in its closed position to connect the two stores in parallel, with or without the association of other circuit elements to govern the ratio of said sharing.
  • a third memory store may be provided together with means for dividin g and transferring thereto any remaining signal stored in said first memory store after the original information has been transferred to the second memory store, whereby a further folding operation canv be initiated by said third store for further folding of the workpiece.
  • a third memory store may be provided together with means for dividing the original information transferred from the first memory store between the second and third memory stores whereby further folding operations can be initiated by said third memory store.
  • One object of the invention is to provide a simple, cheap and robust control apparatus for use with a folding machine for folding flat workpieces.
  • a further object of the invention is to provide a control apparatus for use with a folding machine for giving an accurate fold by the adjustment of a variable resistor as a capacitor supply voltage.
  • FIG. 1 is a schematic diagram of the control system of the invention
  • FIG. 2 shows one preferred input circuit suitable for use with the invention
  • FIG. 3 shows the resistance-capacitor circuit of the invention
  • FIG. 4 shows one preferred output circuit suitable for use with the present invention
  • FIG. 5 is a diagrammatic charge curve for DC charging of capacitor C1 ofFIG. 3;
  • FIG. 6 is a diagrammatic charge curve for the DC charging of capacitor C2 of FIG. 3;
  • FIG. 7 is a schematic diagram of the folding operation
  • FIG. 8 is a diagrammatic charge curve for both DC and pulsed charging ofa capacitor
  • a detector and transmitter unit 14 ing partof a detector and transmitter unit 14 is arranged above conveyor 10 the detector (not shown) being arranged for actuation by a travelling workpiece 16 being carried along on the upper run of endless conveyor formed by the belts or tapes 10.
  • the transmitter 13 comprises a toothed wheel arranged for rotation by the passage of a workpiece l6 therebeneath, the teeth of said toothed wheel being arranged to alternately interrupt and restore a light beam impinging on a photoelectric cell 15.
  • the output waveform of this detector is in the form of a spaced sawtooth voltage 17 which is then fed to a first pulseshaping circuit 11.
  • pulse-shaping circuit 11 which may be used is shown in FIG. 2 and comprises a Schmitt trigger semiconductor circuit (shown on the left of the FIG.) followed be a semiconductor monostable multivibrator (shown on the right of the FIG.) equipped with a resistance-capacitance delay circuit arranged to set a constant pulse width.
  • the output waveform of this pulse-shaping circuit 11 comprises a train of constant width, constant height pulses 19 supplied at a rate proportional to the velocity of the flat workpiece 16 as it drives the toothed wheel of the unit 14.
  • This train of pulses (shown schematically on FIG. 1 emerging from circuit 11) is delivered to the left-hand side of the resistancecapacitance circuit Rl-Cl of the R-C circuit 21 of FIG. 3 for the length of time that the detector associated with the unit 14 is actuated.
  • This detector which may be in the form of a feeler switch, is connected so that operation thereof opens contact 18 (FIG. 3) thus allowing capacitor C1 of the circuit of FIG. 3 to become charged by said train of pulses, as shown in FIG. 5.
  • the charge acquired by'capacitor C1 is thus proportional to the overall length of workpiece 16 because contact 18 is open for the full time that the workpiece is passing under the detector of unit 14.
  • a second transmitter 24, (FIG. 1) similar to transmitter 13 is connected to pulley wheel 28, over which the endless conveyor formed by belts or tapes 10 passes, by a rotatable shaft 26. Shaft 26 thus rotates at a speed proportional to the velocity of workpiece 16 at any particular time, After the workpiece 16 has passed beyond unit 14, the transmitter 24 output voltage is fed cumulatively to capacitor C2 through resistance R2 of the R-C circuit 21 via a second pulse-shaping circuit 30, which can be substantially the same as circuit 11 (FIG. 2).
  • capacitor C2 The charge acquired by capacitor C2 from the second transmitter 24 is thus added to the charge stored on capacitor C2 from the previous charge transfer from capacitor C1.
  • Vp a predetermined firing voltage
  • the output circuit of FIG. 4 conducts to produce an output causing the folding mechanism, indicated schematically by folding blade 32, to operate.
  • contact 20 closes to completely discharge capacitor C2 and thus prepare it for the following cycle, when it will accept a further charge from capacitor C1 being built up thereon by the passage of a succeeding workpiece beneath unit 14.
  • FIG. 4 One preferred form of output circuit which may be used is shown in FIG. 4.
  • This circuit comprises a low leakage unijunction transistor 23 which is used to provide an output pulse at the said firing voltage Vp followed by a thyristor 25 to give the required output signal to the machine for folding the workpiece.
  • T is the time constant for the first memory store Rl-Cl
  • E1 is the aiming voltage of capacitor C1.
  • S1 is the workpiece velocity at the first detector and transmitter unit 14.
  • the charge curve of capacitor C2 is shown in FIG. 6 in which E2 is the aiming voltage of capacitor C2 and Vp is that predetermined voltage at which capacitor C2 is arranged to discharge into the output circuit of FIG. 4, Also T is the time constant for the second memory store R2-C2, and S is workpiece velocity at the second transmitter 24.
  • D 8; T log e :3. constant make D a constant, and satisfy the conditions for the workpiece to be folded in half.
  • the DC charging curve is shown as 44 and the pulsed charging curve as 46.
  • t be the time taken for the DC charging current to charge a capacitor to voltage Vp.
  • I be the time for the pulsed charging current to charge the same capacitor to voltage Vp.
  • I1 P(r1+r)
  • P is the number of pulses received (i.e. number of cycles)
  • r is the time duration of the pulse (i.e. mark duration)
  • r is the time duration before a subsequent pulse (i.e. space duration)
  • second transmitter 24 and pulseshaping circuit 30 can be omitted and a constant DC voltage equivalent to the second pulse train previously mentioned can 'be fed into circuit Rl-C2 when the workpiece has passed unit 14 and circuit Rl-CZ has received its appropriate share of the charge from circuit Rl-Cl.
  • One method for obtaining second and subsequent folds can be achieved by passing (10) the initially folded workpiece through the device and past the folding machine again. In such a case the charge remaining on C1 after some of it has been transferred to C2, can be further shared through a suitable switching device, with another actuating circuit say R3-C3, similar to R2-C2.
  • FIG. 9 A still further embodiment for initiating further folding operations is shown in FIG. 9 in which a resistance-capacitor circuit similar to that shown in FIG. 3 is illustrated.
  • Additional capacitor C2 is firstly charged from the second transmitter 24 and subsequently discharged into the output circuit of FIG. 4, by suitable operation of switches 34, 36, 38, 40 and 42, thereby causing asignal to be issued to the folding machine to fold the workpiece once.
  • the capacitor C3 is then charged, either from the second transmitter, or, from a further transmitter associated with a further folding machine. Subsequently the capacitor C3 discharges into the output circuit of FIG. 4 thereby causing a further fold signal to be issued which in turn causes the workpiece to be folded for a second time.
  • resistors and/or capacitors of the resistance-capacitance circuit may be made variable.
  • a control apparatus for use with a machine for folding a flat workpiece at a folding station, the control apparatus comprising in combination, a first memory store, a first detector and transmitter unit arranged to detect and measure a dimension of a travelling workpiece and transmit a signal whose value is representative of said dimension to said first memory store, said first detector and transmitter unit comprising a photoelectric cell, a light source directing a light beam on said photoelectric cell, a toothed wheel, the teeth of which are arranged to alternately interrupt and restore impingement of said light beam on said photoelectric cell to create said signal at said photocell, means mounting said toothed wheel in cooperating relationship with a workpiece the dimension of which isto be measured and which is travelling along a conveyor in said folding apparatus, means connecting said photoelectric cell and said first memory store to transmit said signal to said first memory store, a second memory store, means for transferring at least part of the signal stored in said first memory store to said second memory store and for subsequently releasing said first memory store to receive subsequent signal from said first detector and transmitter
  • a control apparatus further including tow pulse-shaping circuits each comprising a Schmitt trigger stage followed by a monostable multivibrator for producing a train of constant width, constant height pulses at a rate proportional to the velocity of the fiat workpiece, the output of said transmitter units being fed to said pulse-shaping circuits respectively, and means respectively connecting said pulse-shaping circuits with said first and second memory store.
  • each of the first and second memory stores is an electronic circuit and comprises at least one storage capacitor, each storage capacitor being connected to its associated transmitter through a resistance, the arrangement thus forming a resistance-capacitor circuit.
  • a control apparatus comprising a switch, arranged when in its closed position to connect the tow stores in parallel, with or without the association of other circuit elements to govern the ratio of said storing.
  • a control apparatus is provided together with means for dividing or transferring any remaining signal stored in said first memory store after the original information has been transferred to the second memory store, whereby a can folding initiated be by said third store for further folding of the workpiece. transmitting 6.
  • a control apparatus is provided together with means for dividing the original information transferred from the first memory store between the second and third memory stores whereby further folding operations can be initiated by said third memory store.
  • a control apparatus for use with a machine for folding a flat workpiece which includes conveyor means for carrying a fiat workpiece between a sensing station and a folding station, the control apparatus comprising, a detector and transmitter means including a feeler switch, a toothed wheel and a photocell for detecting and transmitting the length of a workpiece as it travels on the conveyor means and for transmitting a signal corresponding to the length of the workpiece, a pulseshaping circuit means for receiving a signal from said detector and transmitter means, and R-C memory storage means for receiving a signal from said pulse-shaping circuit means, a second capacitor, a switch means for transferring at least part of said signal from capacitor, first capacitor to said second capacitor, a second transmitter means including rotatable shaft operatively connected to said conveyor means to transmit to said second capacitor a further and cumulative signal corresponding to part of the length of said workpiece after the workpiece has left said sensing station, and means including said second capacitor for initiating a folding operation on the workpiece when the workpiece is in
  • a control apparatus as defined in claim 7 further including means for discharging said first capacitor after said part of said signal is transferred from said first capacitor to said second capacitor for permitting said first capacitor to receive subsequent signals from said pulse-shaping circuit in response to the passage of a subsequent workpiece by said sensing sta- IIOII.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
US734654A 1967-06-17 1968-06-05 Control apparatus for the measurement and folding of flat workpieces Expired - Lifetime US3589709A (en)

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Application Number Priority Date Filing Date Title
GB28023/67A GB1217157A (en) 1967-06-17 1967-06-17 Improvements in or relating to a control apparatus for the measurement and folding of flat workpieces

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US (1) US3589709A (da)
JP (1) JPS4821388B1 (da)
DE (1) DE1763481A1 (da)
DK (1) DK133183C (da)
FR (1) FR1573332A (da)
GB (1) GB1217157A (da)
SE (1) SE336907B (da)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3831927A (en) * 1970-04-24 1974-08-27 Oce Van Der Grinten Nv Method and apparatus for folding sheets such as drawings
US3899166A (en) * 1973-12-07 1975-08-12 Super Laundry Mach Co Laundry folding machine
US4737045A (en) * 1985-08-06 1988-04-12 Siemens Aktiengesellschaft Paper web stacking controlled by electronic motor controlled by form length
US5079867A (en) * 1990-03-05 1992-01-14 Chicago Dryer Company Ironer-folder for flatwork, apparatus and method
US5087023A (en) * 1990-08-23 1992-02-11 The Standard Register Company Apparatus and method for folding separated forms in a stack
US5123890A (en) * 1990-03-29 1992-06-23 G. Fordyce Company Apparatus and method for separating forms in a stack
US5360213A (en) * 1990-06-07 1994-11-01 Roll Systems, Inc. Apparatus for separating folded web
US5364332A (en) * 1993-07-01 1994-11-15 Xerox Corporation Soft nip folder
US5540647A (en) * 1993-02-18 1996-07-30 Jensen Ag Burgdorf Folding apparatus for automatic folding of flatwork
US5558318A (en) * 1991-01-15 1996-09-24 Roll Systems, Inc. Separator for forming discrete stacks of folded web
US5596861A (en) * 1995-10-24 1997-01-28 Preston; Charles E. System and method for establishing an absolute reference point for an envelope inserter cycle
AU691555B2 (en) * 1994-03-11 1998-05-21 Oce-Nederland B.V. A device for folding a sheet in two directions
US20120035032A1 (en) * 2009-03-27 2012-02-09 Markus Wilhelm Decker Method for operating a longitudinal folding machine comprising a folding blade and folding table as wll as such a longitudinal folding machine
EP2963174A4 (en) * 2013-05-17 2016-04-06 Purex Co Ltd STOFFSTÜCKFALTVORRICHTUNG
US20170131205A1 (en) * 2015-11-11 2017-05-11 Hisense Co., Ltd. Method and device for detecting flatness of a fluorescent wheel in a laser light source

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1324325A (en) * 1971-03-22 1973-07-25 Broadbent & Sons Ltd Thomas Self-centering crossfolder
DE2945885A1 (de) * 1979-11-14 1981-06-04 Herbert Kannegiesser Gmbh + Co, 4973 Vlotho Vorrichtung zum falten von waeschestuecken

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374779A (en) * 1942-03-27 1945-05-01 American Laundry Company Sequence timer and measuring control
US3363897A (en) * 1965-03-09 1968-01-16 Allis Louis Co Control for folding machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374779A (en) * 1942-03-27 1945-05-01 American Laundry Company Sequence timer and measuring control
US3363897A (en) * 1965-03-09 1968-01-16 Allis Louis Co Control for folding machines

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3831927A (en) * 1970-04-24 1974-08-27 Oce Van Der Grinten Nv Method and apparatus for folding sheets such as drawings
US3899166A (en) * 1973-12-07 1975-08-12 Super Laundry Mach Co Laundry folding machine
US4737045A (en) * 1985-08-06 1988-04-12 Siemens Aktiengesellschaft Paper web stacking controlled by electronic motor controlled by form length
US5079867A (en) * 1990-03-05 1992-01-14 Chicago Dryer Company Ironer-folder for flatwork, apparatus and method
US5123890A (en) * 1990-03-29 1992-06-23 G. Fordyce Company Apparatus and method for separating forms in a stack
US5360213A (en) * 1990-06-07 1994-11-01 Roll Systems, Inc. Apparatus for separating folded web
US5087023A (en) * 1990-08-23 1992-02-11 The Standard Register Company Apparatus and method for folding separated forms in a stack
US5558318A (en) * 1991-01-15 1996-09-24 Roll Systems, Inc. Separator for forming discrete stacks of folded web
US5540647A (en) * 1993-02-18 1996-07-30 Jensen Ag Burgdorf Folding apparatus for automatic folding of flatwork
US5364332A (en) * 1993-07-01 1994-11-15 Xerox Corporation Soft nip folder
AU691555B2 (en) * 1994-03-11 1998-05-21 Oce-Nederland B.V. A device for folding a sheet in two directions
US5596861A (en) * 1995-10-24 1997-01-28 Preston; Charles E. System and method for establishing an absolute reference point for an envelope inserter cycle
US20120035032A1 (en) * 2009-03-27 2012-02-09 Markus Wilhelm Decker Method for operating a longitudinal folding machine comprising a folding blade and folding table as wll as such a longitudinal folding machine
US8251882B2 (en) * 2009-03-27 2012-08-28 Koenig & Bauer Aktiengesellschaft Method for operating a longitudinal folding apparatus having a folding blade and a folding table, and longitudinal folding apparatus
EP2963174A4 (en) * 2013-05-17 2016-04-06 Purex Co Ltd STOFFSTÜCKFALTVORRICHTUNG
US9752277B2 (en) 2013-05-17 2017-09-05 Purex Co., Ltd. Cloth piece folding device
US20170131205A1 (en) * 2015-11-11 2017-05-11 Hisense Co., Ltd. Method and device for detecting flatness of a fluorescent wheel in a laser light source
US10132751B2 (en) * 2015-11-11 2018-11-20 Hisense Co., Ltd. Method and device for detecting flatness of a fluorescent wheel in a laser light source

Also Published As

Publication number Publication date
GB1217157A (en) 1970-12-31
DE1763481A1 (de) 1971-04-15
DK133183B (da) 1976-04-05
DK133183C (da) 1976-09-06
JPS4821388B1 (da) 1973-06-28
SE336907B (da) 1971-07-19
FR1573332A (da) 1969-07-04

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