US3254888A - Sheet feeding apparatus having ultrasonic means to detect overlapping - Google Patents

Sheet feeding apparatus having ultrasonic means to detect overlapping Download PDF

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Publication number
US3254888A
US3254888A US293024A US29302463A US3254888A US 3254888 A US3254888 A US 3254888A US 293024 A US293024 A US 293024A US 29302463 A US29302463 A US 29302463A US 3254888 A US3254888 A US 3254888A
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US
United States
Prior art keywords
sheets
receiver
feed
transmitter
sheet
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
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US293024A
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English (en)
Inventor
Street Leslie John
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.)
Parnall and Sons Ltd
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Parnall and Sons Ltd
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Filing date
Publication date
Application filed by Parnall and Sons Ltd filed Critical Parnall and Sons Ltd
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Publication of US3254888A publication Critical patent/US3254888A/en
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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
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
    • B65H7/12—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation
    • B65H7/125—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation sensing the double feed or separation without contacting the articles
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K13/00—Conveying record carriers from one station to another, e.g. from stack to punching mechanism
    • G06K13/02—Conveying record carriers from one station to another, e.g. from stack to punching mechanism the record carrier having longitudinal dimension comparable with transverse dimension, e.g. punched card
    • G06K13/06—Guiding cards; Checking correct operation of card-conveying mechanisms
    • G06K13/067—Checking presence, absence, correct position, or moving status of cards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/30—Sensing or detecting means using acoustic or ultrasonic elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1912—Banknotes, bills and cheques or the like

Definitions

  • This invention relates to sheet feeding apparatus, for example, of the kind wherein the sheets are fedsingly from a stack in machines for sorting bank checks, football pool coup-ons and the like into receiving stations appropriate to coded information on the sheets.
  • the invention consists of the incorporation in sheet feeding apparatus of means for detecting the feed of two or more overlapping sheets comprising a transmitter and a receiver of longitudinal air pressure vibrations located on opposite sides of the path of feed of a sequence of sheets, and control means for varying the output' of the transmitter and/or the sensitivity of the receiver for distinguishing between the presence of one and two or more overlapping sheets between said transmitter and receiver.
  • the invention further resides in the meth-od of detecting the feeding of two or more'overlapping sheets comprising4 the adjustment of the output and/or the sensitivity respectively of a transmitter and receiver of longitudinal air pressure vibrations located one on each side of the path of feed of a sequence of sheets so that the receiver senses the difference between the presence of a single sheet and two or more overlapp-ing sheets between said transmitter and receiver, and utilizing the response of the receiver to the feed of two or more overlapping sheets to initiate action in apparatus feeding and/ or receiving said sequence of sheets.
  • said longitudinal air pressure vibrations are of ultra-sonic wave length.
  • the sheet feeding apparatus illustrated is designed to deliver single sheets intermittently from a stack of sheets such as, for example, bank checks, or football pool coupons, and comprises a magazine 10 for accommodating a stack 11 of said sheets with the sheets disposed in parallel vertical planes also parallel with the plane of a feed 3,254,888 Patented June 7, 1966 gap between the forward and reverse running elements forming parts of sheets transporting and rejecting means respectively hereinafter described.
  • Means is provided for urging thefront face of the foremost sheet 12 of the stack into engagement with the forward running elements 13 of the sheet transporting means for example by supporting the magazine 12 on a conveyor belt 14 so that the conveyor urges the front partly open face of the magazine 12 towards said forward running elements 13.
  • the sheet transporting means comprises two parallel running toothed endless rubber belts 13 passing over continuously driven toothed pulley wheels 27 so that the belts follow parallel triangular courses with their upward vertical runs dening one side of the feed gap.
  • the belts 13 are ported in longitudinally spaced apart regions and the said vertical runs move before respective hollow shoes 15 to which are applied a partial vacuum.
  • a portedflat face 16 of a fixed sheet rejecting head generally designated 17.
  • Within the head 17 is disposed a drum (not shown) having ports in approximately one half of its circumference with another part of the circumference stepped inwardly to a lesser radius than that of the ported sector.
  • the ported drum sector projects through a window in the ported face 16 slightly beyond the plane of said face.
  • the drum is continuously rotated in the opposite direction to that of the pulley wheels 27 and in synchrony with the movement of the belts 13.
  • the ports in the face 116 of the rejecting head and periphery of the drum communicate through valve ports in the drum, to a vacuum source (not shown).
  • the aforesaid rejecting head is more fully described and claimed in the specification of our patent application No. 269,245 filed April l, 1963 in the United States.
  • the belts 13 coact with idle rollers 26,' serving to continue the feed of the sheets from the sphere of operation of the rejecting head 17 to reading and/ or sorting mechanism (not shown).
  • an output head 28 Located one on each side of the path of the intermittently fed sheets on the horizontal runs of the belts 13 and aligned substantially normally to the plane of said sheets is an output head 28 connected to a transmitter 29, and a receiver 30.
  • the transmitter 29 and receiver 30 consist of magneto-striction transducers generating and receiving longitudinal air pressure vibrations preferably in the ultra-sonic range between kc./sec. and 100 kc./sec. with 40 kc./sec. found to be a particularly practical choice.
  • the invention is not limited to the aforesaid wave band since both higher and lower frequencies can be employed although in the case of frequencies below 20 kc./sec. extraneous noise can cause diiiiculty.
  • transmitter and receiver may advantageously be that marketed by Delavan Manufacturing Company of West Des Moines, Iowa, under the name of Sonac coupler assemblies and described in Descriptive Bulletin 41-2 of Augsut 1961 published by that company.
  • transducers 29 and 30 may both be located irnmediately in proximity to the path of the sheets it is more convenient to feed for example the output from the remote transmitter 29 via a pipe 31 to the head 28 as illustrated. Both the transmitter 29 and the receiver are connected to an amplifier 32 incorporating a sensitivity or gain control 33, and the amplifier output controls a relay 34 having output terminals 35.
  • the relay controlled terminals 35 are connected for example to control the feed of the sheets to subsequent sheet processing apparatus.
  • the opening of the circuit through the terminals 35 may be used via a solenoid valve 36 connected to the terminals 35 by line 37 to vent supply conduit 38 leading to the vacuum shoes 15 to atmosphere to arrest Si further feeding from the stack 11, and to operate via a further solenoid a detlector to divert all sheets in transit to an appropriate receptacle.
  • the terminals may simply be connected to an alarm device.
  • a stack 11 of sheets is inserted in the magazine with the sheets parallel t0 the feed gap and the front face of the foremost sheet 12 urged into engagement with the upward runs of the ported belts 13.
  • the vacuum in the shoes 15 behind the belts 13 is communicated through the belt ports and serves to suck the foremost sheet 12 against the belts 13 whereby the sheet 12 is lifted from the stack and is transported into the region of the fixed head 17.
  • the vacuum is applied to the ports in the face 16 of the fixed head and this usually serves to suck onto this face 16 any second sheet that may be adhering to the foremost sheet 12, while allowing the first sheet to proceed in View of the low friction between two overlapping sheets.
  • the vacuum is then applied to the ports in the reverse running drum so that the drum tends to return any second sheet back towards the stack 11.
  • the sensitivity control 33 is adjusted to give an acceptance of one thickness of the sheets, with a reasonable margin of tolerance, without operation of the relay 34, Whereas the presence of two or more thicknesses of sheets between the transmitter head 28 and receiver ⁇ 30 blocks transmis-sion of the ultrasonic beam and thereby is made to give rise to a loss of signal in the receiver sufficient to operate the relay so as for example to arrest further feeding and to -direct the sheets in transit to a reject station from whence they can be later taken for further processing.
  • the above device is particularly effective -in sensing a pair of overlapping -sheets not simply due to the relatively small signal loss owing to the presence of a double thickness of sheets between the transducers, but due to the unexpectedly large signal loss which is found to occur at the interface between the sheets, this being important in practice since the device is thereby able toy distinguish reliably between a wide variety of single sheet thicknesses and the presence of two overlapping sheets. Further the device is insensitive to variation in colour density of the sheets, unlike photoelectric devices, and makes use of parts having long life.
  • a sheet feeding apparatus incorporating means for detecting the presence of two or more overlapping sheets of paper or the like moving along a feed path from a feeding means adapted to normally feed said sheets one at a time along said path comprising a transmitter and a receiver of longitudinal air pressure vibrations located on opposite sides of the path of feed of a sequence of said sheets, and control means for adjusting said detector means to condition it for distinguishing between the presence of one and two or more overlapping sheets traversing the beam of longitudinal air pressure vibrations between said tran-smitter and receiver.
  • Sheet feeding apparatus according to claim 1 wherein said transmitter and receiver operate at a frequenc above 20 kc./ sec.
  • Sheet feeding apparatus according to claim 1 wherein said transmitter and receiver operate at a frequency between 20 kc./ sec. and 100 kc./sec.
  • a method of detecting the feeding of two or more overlapping sheets of paper or the like comprising the adjustment of detection means consisting essentially of a transmitter and receiver of longitudinal air pressure vibrations located one on each side of the path of feed of a sequence of sheets issuing from feed means adapted to normally feed said sheets one at a time along said path so that the receiver senses the difference between the presence of a single sheet and two or more overlapping sheets traversing the beam of longitudinal air pressure vibrations between said transmitter and receiver, and utilizing the response of the receiver to the feed of two or more overlapping sheets to initiate action in apparatus handling said sequence of sheets.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US293024A 1962-07-06 1963-07-05 Sheet feeding apparatus having ultrasonic means to detect overlapping Expired - Lifetime US3254888A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25956/62A GB1040158A (en) 1962-07-06 1962-07-06 Improvements in or connected with sheet feeding apparatus

Publications (1)

Publication Number Publication Date
US3254888A true US3254888A (en) 1966-06-07

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ID=10236049

Family Applications (1)

Application Number Title Priority Date Filing Date
US293024A Expired - Lifetime US3254888A (en) 1962-07-06 1963-07-05 Sheet feeding apparatus having ultrasonic means to detect overlapping

Country Status (4)

Country Link
US (1) US3254888A (enrdf_load_stackoverflow)
FR (1) FR1361736A (enrdf_load_stackoverflow)
GB (1) GB1040158A (enrdf_load_stackoverflow)
NL (1) NL294955A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948170A (en) * 1972-05-25 1976-04-06 Sylve Jack Donald Ericsson Arrangement in silkscreen printing machine
JPS6270707A (ja) * 1985-09-25 1987-04-01 Sanko Seiki Kk 移送途中の被測定物の超音波利用による重層検知装置
US5583828A (en) * 1994-04-05 1996-12-10 Nireco Corporation Method and apparatus for detection of edge position thickness or splice position of a material web
EP1871085A1 (en) * 2006-06-22 2007-12-26 Management Augusto, S.L High speed system based on image capture, for automatic information extraction from documents with an even or variable thickness

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3023286B1 (fr) 2014-07-02 2018-02-16 Arkema France Procede de fabrication de tetrafluoropropene

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2063479A (en) * 1935-11-18 1936-12-08 Frank R Belluche Sheet feeding mechanism
US2277037A (en) * 1940-01-16 1942-03-24 Gen Electric Fruit ripeness tester
US2994528A (en) * 1959-05-18 1961-08-01 Pitney Bowes Inc Device for detecting the feeding of overlapping documents
US2999589A (en) * 1960-03-09 1961-09-12 Industrial Nucleonics Corp Classifying apparatus
US3131816A (en) * 1961-05-15 1964-05-05 Jr Toney Mizell Can sorting device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2063479A (en) * 1935-11-18 1936-12-08 Frank R Belluche Sheet feeding mechanism
US2277037A (en) * 1940-01-16 1942-03-24 Gen Electric Fruit ripeness tester
US2994528A (en) * 1959-05-18 1961-08-01 Pitney Bowes Inc Device for detecting the feeding of overlapping documents
US2999589A (en) * 1960-03-09 1961-09-12 Industrial Nucleonics Corp Classifying apparatus
US3131816A (en) * 1961-05-15 1964-05-05 Jr Toney Mizell Can sorting device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948170A (en) * 1972-05-25 1976-04-06 Sylve Jack Donald Ericsson Arrangement in silkscreen printing machine
JPS6270707A (ja) * 1985-09-25 1987-04-01 Sanko Seiki Kk 移送途中の被測定物の超音波利用による重層検知装置
US5583828A (en) * 1994-04-05 1996-12-10 Nireco Corporation Method and apparatus for detection of edge position thickness or splice position of a material web
EP1871085A1 (en) * 2006-06-22 2007-12-26 Management Augusto, S.L High speed system based on image capture, for automatic information extraction from documents with an even or variable thickness

Also Published As

Publication number Publication date
GB1040158A (en) 1966-08-24
NL294955A (enrdf_load_stackoverflow)
FR1361736A (fr) 1964-05-22

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