EP0650911A1 - Dispositif et procédé pour reconnaître le chevauchement d'envois plats flexibles - Google Patents

Dispositif et procédé pour reconnaître le chevauchement d'envois plats flexibles Download PDF

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Publication number
EP0650911A1
EP0650911A1 EP94112015A EP94112015A EP0650911A1 EP 0650911 A1 EP0650911 A1 EP 0650911A1 EP 94112015 A EP94112015 A EP 94112015A EP 94112015 A EP94112015 A EP 94112015A EP 0650911 A1 EP0650911 A1 EP 0650911A1
Authority
EP
European Patent Office
Prior art keywords
mail
transport route
items
mail items
deflection
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.)
Granted
Application number
EP94112015A
Other languages
German (de)
English (en)
Other versions
EP0650911B1 (fr
Inventor
Gerhard Goldkuhle
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.)
Siemens AG
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0650911A1 publication Critical patent/EP0650911A1/fr
Application granted granted Critical
Publication of EP0650911B1 publication Critical patent/EP0650911B1/fr
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
    • 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

Definitions

  • the invention relates to a device and a method for the detection of overlaps of bendable flat mail items according to the preamble of patent claims 1 and 9, respectively.
  • the undetected double deductions are of particular importance because they can increase the misdistribution rate due to reading errors in the automatic address recognition or incorrect keying in when entering addresses manually.
  • overlapping mail items can increase the mechanical susceptibility to malfunction of mail distribution systems.
  • detected double feeds can be treated as reject items, thus avoiding misdistribution and mechanical malfunctions.
  • the problems arising from double deduction errors can also be reduced by identifying overlapping of the mail items.
  • tracks that can be optically scanned on the front and / or rear of the consignment surface, if possible over the entire consignment length can be applied to the consignment surface by rolling up or spraying on bars, bar codes or other patterns.
  • Consignment overlaps can be determined later by optical scanning of these tracks, since partial overlaps are missing or line jumps occur. With these methods, it is necessary to pre-treat the shipments in a first step, i.e. with traces. In a second step after further separation, e.g.
  • a disadvantage of this method is that a high mechanical effort has to be made in order to walk or bend the mail items to determine possible track interruptions. It is also disadvantageous that the identification lines may only be applied in the areas of the mail items that are not covered by transport belts, since otherwise the surface of the mail items and the transport belts will be smeared.
  • the object of the present invention is to provide a device and a method for detecting overlaps of flexible flat mail items.
  • the invention is based on temporarily deflecting movable sections of the shipment perpendicular to the direction of conveyance and detecting the presence of overlapping sections of the shipment by evaluating the snapback behavior of the shipments.
  • the analysis of the snap back behavior of the items can be done in different ways.
  • the detection of overlapping mail sections can be carried out by taking measurements of the temporary distance between the trailing edges of the deflected mail sections.
  • detection can also be carried out by measuring changes in capacitance when an oscillator is detuned, or by sensing the pressure exerted by the tear-off edges after the snapback.
  • the invention advantageously provides extensive independence in the detection of overlaps from the surface condition of the mail items. Therefore, in the solution according to the invention, stickers, brands, edge bands or windows are also incorrectly identified as indicators of overlaps.
  • the shipment sections can be deflected perpendicularly to the conveying direction on the front of the shipment or on the back of the shipment. For a comprehensive detection of overlaps, it is advantageous to deflect the movable consignment sections perpendicularly to the conveying direction both on the consignment side and on the consignment side and to evaluate the rapid response of the consignments for each of these deflection types.
  • deflection elements are arranged on opposite sides of the transport route in order to deflect the mail items both on the front side of the mail item and on the back side of the mail item.
  • the detection device for detecting overlaps has an illumination device for generating light bundles and at least two optical receivers, the light bundles being focused on the area in which the transmission sections are temporarily deflected and the optical receivers opposite sides of the transport route are arranged such that the incidence of light into the optical receiver is interrupted at the same time only when deflecting mail items with overlapping sections.
  • the transport path 1 has two transport belts 2, 3, which are guided over a letter plate 4.
  • the drive and guide elements usually used to drive and guide the transport belts are not shown for the sake of simplicity.
  • the flat broadcasts i.e. Long letters, letters and postcards of various formats are usually conveyed standing on their long edge in the transport route.
  • the conveyor belts cover only a small section of the entire surface of the shipment, so that larger sections of the shipment protrude above and below the conveyor belts.
  • the invention also relates to transport routes in which the mailings are conveyed in a manner other than with two transport belts, as long as it is only ensured that the mailpieces protrude over an edge against which the mailpiece sections can be deflected.
  • the mail deflection element 6 is preferably rod-shaped and arranged laterally offset from the transport route. It protrudes into the transport path, so that a conveyed letter, as soon as it reaches the region of the transport path into which the deflection element projects, is forcibly deflected in the sections projecting beyond the transport belts.
  • the deflection element forms an obtuse angle ⁇ with the transport direction, so that a slow, gentle deflection of the relevant shipment sections.
  • the distance of the end of the deflection element on the side of the shipment from the plane of transport of the items determines the maximum deflection of the portions of the item, which can thus be adapted to the bending properties of the items.
  • the deflection element is fastened to a carrier 7, so that the element is arranged at a sufficient distance from the edge of the conveyor belts, above the conveyor belts.
  • a maximum permissible deflection force can be achieved by rotating the deflection element with any counterforce.
  • Optical receivers 9, 10 are arranged on opposite sides of the transport route.
  • an illumination device is arranged, which emits light beams in the direction of the optical receivers.
  • Halogen lamps, LEDs or other quickly switchable light sources are preferably used for this, so that the light beams are emitted with a pulse sequence between 10 and 100 kHz.
  • the lighting device and the optical receivers are electrically connected to evaluation electronics, not shown, which control and monitor the emission and reception of the light beams.
  • evaluation electronics not shown, which control and monitor the emission and reception of the light beams.
  • an arbitrarily high alternating voltage gain is used in the receiving part of the device.
  • the device works as follows: As long as no mail is deflected, none of the light beams that are emitted in the direction of the optical receivers 9, 10 are interrupted. As soon as a shipment is deflected, the light beam received by the optical receiver 9, which is arranged on the side into which the shipment is deflected, is first interrupted. If it is a single deduction, i.e. a non-overlapping consignment, the interruption of this bundle of light is then canceled, i.e. as soon as the temporarily deflected portion of the consignment has snapped back, and during a time interval that depends on the transport speed of the consignments, in the direction of the optical one Receiver 10 emitted bundles of light interrupted by the now receded section of the program.
  • the light beam emitted in the direction of the optical receiver 10 is interrupted by the overlapping shipment.
  • the second shipment is still in the region of the deflection element 6, so that the section projecting over the edge of the conveyor belt is deflected out and the light beam emitted in the direction of the optical receiver 9 is likewise interrupted.
  • FIG. 2 shows a top view of the configuration for an overlapping pair of mail items D1, D2. Since at the point in time at which the first shipment D1 has already been conveyed out of the area of the deflection element 6, so that the rear edge of the shipment D1 has flipped back and the light beam emitted in the direction of the photoreceptor 10 is interrupted, a section of the shipment D2 is still is deflected, the beam that is emitted in the direction of the photo receiver 9 is still interrupted. The result is an interruption in both light beams.
  • the deflection element 6 there are an upper and a lower transmission. So that a detection of overlaps is possible according to the method described above, it is necessary for the lower mail item to have a section which is not covered or overlapped by the upper mail item, so that this section is deflected after the upper mail item has not is deflected more. Therefore, in order to detect as many overlaps as possible, it is advantageous to provide two deflection elements offset one behind the other, each with associated optical receivers, so that the mail items are successively in opposite directions, i.e. are deflected on the front side of the shipment as well as on the back of the shipment, and in each of these types of deflection, the quick-response behavior of the shipments is evaluated.
  • FIG. 3 shows a top view of a preferred embodiment in which, after the items have been separated in a double separating device 12, the items in the transport route 1 are first led to a first deflection element 61 and then to a second deflection element 62.
  • the illumination device 111 and the optical receivers 91 and 101 are assigned to the deflection element 61.
  • the illumination device 112 and the optical receivers 92 and 102 are assigned to the deflection element 62.
  • the mail items are deflected both on the front side and on the back side of the mail item.

Landscapes

  • Controlling Sheets Or Webs (AREA)
  • Sorting Of Articles (AREA)
EP94112015A 1993-10-29 1994-08-02 Dispositif et procédé pour reconnaítre le chevauchement d'envois plats flexibles Expired - Lifetime EP0650911B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4337004 1993-10-29
DE4337004A DE4337004A1 (de) 1993-10-29 1993-10-29 Vorrichtung und Verfahren zum Erkennen von Überlappungen von biegbaren flachen Sendungen

Publications (2)

Publication Number Publication Date
EP0650911A1 true EP0650911A1 (fr) 1995-05-03
EP0650911B1 EP0650911B1 (fr) 1998-12-02

Family

ID=6501371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94112015A Expired - Lifetime EP0650911B1 (fr) 1993-10-29 1994-08-02 Dispositif et procédé pour reconnaítre le chevauchement d'envois plats flexibles

Country Status (6)

Country Link
US (1) US5560598A (fr)
EP (1) EP0650911B1 (fr)
JP (1) JPH07172628A (fr)
CN (1) CN1109439A (fr)
AT (1) ATE173999T1 (fr)
DE (2) DE4337004A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001089724A1 (fr) * 2000-05-23 2001-11-29 Koninklijke Kpn N.V. Dispositif et procede de detection d'objets se recouvrant
WO2001094246A1 (fr) * 2000-06-06 2001-12-13 Siemens Aktiengesellschaft Dispositif pour identifier des envois postaux plats, souples, qui se chevauchent

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625044A1 (de) * 1996-06-22 1998-01-02 Siemens Ag Verfahren zum Erkennen von Überlappungen von flachen Sendungen
DE19625043C1 (de) * 1996-06-22 1997-04-10 Aeg Electrocom Gmbh Verfahren zur Ermittlung von Überlappungen
JP3731976B2 (ja) * 1997-05-23 2006-01-05 日立オムロンターミナルソリューションズ株式会社 重送検知装置および方法
US6189879B1 (en) * 1998-11-09 2001-02-20 Heidelberger Druckmaschinen Ag Thickness measurement apparatus
US6328300B1 (en) 1999-10-04 2001-12-11 Pitney Bowes Inc. Aligner mechanism for a mail handling system
DE10142331C1 (de) * 2001-08-30 2003-03-27 Siemens Dematic Ag Verfahren und Anordnung zum Erkennen von Überlappungen
EP1472165B1 (fr) * 2001-12-03 2006-07-12 Siemens AG Dispositif et procede de detection d'envois postaux chevauchants
US7025348B2 (en) * 2002-11-25 2006-04-11 Eastman Kodak Company Method and apparatus for detection of multiple documents in a document scanner using multiple ultrasonic sensors
DE10310546B3 (de) * 2003-03-11 2004-08-26 Siemens Ag Verfahren zur Ermittlung von Mehrfachabzüge betreffenden Leistungswerten einer Sortiermaschine und eines Detektors zum Erkennen der Mehrfachabzüge
DE10319723B3 (de) * 2003-05-02 2004-09-16 Siemens Ag Verfahren und Vorrichtung zum Ausrichten von flachen Sendungen auf eine Schmalseite
DE10335645B3 (de) * 2003-08-04 2005-01-20 Siemens Ag Verfahren zum Betrieb eines Detektors zum Erkennen von Überlappungen flacher Sendungen in einer Sortiermaschine
DE10361720B3 (de) * 2003-12-30 2005-05-25 Siemens Ag Verfahren und Anordnung zum Erkennen von überlappten flachen Sendungen
US7201369B2 (en) * 2004-12-09 2007-04-10 Lockheed Martin Corporation Vertical justification system
DE102005031492A1 (de) * 2005-07-06 2007-01-11 Siemens Ag Verfahren zur Ablage eines frei bewegenden flachen Gegenstands
US8585050B2 (en) 2011-12-06 2013-11-19 Eastman Kodak Company Combined ultrasonic-based multifeed detection system and sound-based damage detection system
CN110665839B (zh) * 2019-10-12 2021-11-05 山东安盛汽车配件股份有限公司 一种基于视觉检测的板簧弧度检测设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578315A (en) * 1968-10-04 1971-05-11 Honeywell Inf Systems Overlapped document detector
US3988017A (en) * 1975-03-20 1976-10-26 Lockheed Electronics Co., Inc. Workpiece feeding device
EP0028056A1 (fr) * 1979-08-09 1981-05-06 Ncr Canada Ltd - Ncr Canada Ltee Appareil et procédé pour contrôler le chevauchement d'objets

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
US3283163A (en) * 1963-11-06 1966-11-01 Ibm Photosensitive overlapped document detector
US3902411A (en) * 1973-01-26 1975-09-02 Addressograph Multigraph Form feed and transport assembly
DE3317863A1 (de) * 1983-05-17 1984-11-22 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Reibvereinzeler
CH660350A5 (de) * 1983-06-14 1987-04-15 Ferag Ag Einrichtung zum feststellen mehrfach belegter plaetze in einem kontinuierlich gefoerderten strom von gleichmaessige abstaende voneinander aufweisenden druckprodukten sowie verwendung dieser einrichtung.
FR2617466B1 (fr) * 1987-07-01 1990-10-12 Cga Hbs Dispositif d'extraction et de mise en vitesse d'objets plats
US4974825A (en) * 1988-09-09 1990-12-04 Ciba-Geigy Corporation Envelope feeder with separator shuttle assembly
US5202557A (en) * 1992-04-06 1993-04-13 Electrocom Automation L.P. Method and apparatus for detecting overlapping products in a singulated product stream
JPH05294513A (ja) * 1992-04-17 1993-11-09 Fuji Photo Film Co Ltd 自動給紙装置の重送検出装置
DE4313850C2 (de) * 1993-04-28 1996-10-02 Arnd Dr Diestelhorst Alarmanlage zur Montage an leicht bewegliche Güter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578315A (en) * 1968-10-04 1971-05-11 Honeywell Inf Systems Overlapped document detector
US3988017A (en) * 1975-03-20 1976-10-26 Lockheed Electronics Co., Inc. Workpiece feeding device
EP0028056A1 (fr) * 1979-08-09 1981-05-06 Ncr Canada Ltd - Ncr Canada Ltee Appareil et procédé pour contrôler le chevauchement d'objets

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001089724A1 (fr) * 2000-05-23 2001-11-29 Koninklijke Kpn N.V. Dispositif et procede de detection d'objets se recouvrant
NL1015266C2 (nl) * 2000-05-23 2001-12-14 Koninkl Kpn Nv Inrichting en werkwijze voor het detecteren van overlappende voorwerpen.
US6935171B2 (en) 2000-05-23 2005-08-30 De Haas Jacobus Johannes Device and method for detecting overlapping objects
WO2001094246A1 (fr) * 2000-06-06 2001-12-13 Siemens Aktiengesellschaft Dispositif pour identifier des envois postaux plats, souples, qui se chevauchent

Also Published As

Publication number Publication date
CN1109439A (zh) 1995-10-04
JPH07172628A (ja) 1995-07-11
US5560598A (en) 1996-10-01
DE59407384D1 (de) 1999-01-14
EP0650911B1 (fr) 1998-12-02
ATE173999T1 (de) 1998-12-15
DE4337004A1 (de) 1995-05-04

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