EP1237807A1 - Procede permettant de determiner et de verifier le nombre de feuilles de papier formant une rame de papier dans une machine servant a selectionner des rames - Google Patents

Procede permettant de determiner et de verifier le nombre de feuilles de papier formant une rame de papier dans une machine servant a selectionner des rames

Info

Publication number
EP1237807A1
EP1237807A1 EP00973139A EP00973139A EP1237807A1 EP 1237807 A1 EP1237807 A1 EP 1237807A1 EP 00973139 A EP00973139 A EP 00973139A EP 00973139 A EP00973139 A EP 00973139A EP 1237807 A1 EP1237807 A1 EP 1237807A1
Authority
EP
European Patent Office
Prior art keywords
ream
sheets
pile
weight
height
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.)
Withdrawn
Application number
EP00973139A
Other languages
German (de)
English (en)
Inventor
Andrea Cinotti
Gabriele Canini
Massimo Milani
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.)
Fabio Perini SpA
Original Assignee
Fabio Perini SpA
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 Fabio Perini SpA filed Critical Fabio Perini SpA
Publication of EP1237807A1 publication Critical patent/EP1237807A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B65H3/00—Separating articles from piles
    • B65H3/32—Separating articles from piles by elements, e.g. fingers, plates, rollers, inserted or traversed between articles to be separated and remainder of the pile
    • B65H3/322—Separating articles from piles by elements, e.g. fingers, plates, rollers, inserted or traversed between articles to be separated and remainder of the pile for separating a part of the pile, i.e. several articles at once
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/32—Separating articles from piles by elements, e.g. fingers, plates, rollers, inserted or traversed between articles to be separated and remainder of the pile
    • B65H3/322—Separating articles from piles by elements, e.g. fingers, plates, rollers, inserted or traversed between articles to be separated and remainder of the pile for separating a part of the pile, i.e. several articles at once
    • B65H3/325—Separating articles from piles by elements, e.g. fingers, plates, rollers, inserted or traversed between articles to be separated and remainder of the pile for separating a part of the pile, i.e. several articles at once the pile being pre-marked
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/30—Numbers, e.g. of windings or rotations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/51—Presence
    • B65H2511/512—Marks, e.g. invisible to the human eye; Patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/10—Mass, e.g. mass flow rate; Weight; Inertia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/20—Calculating means; Controlling methods
    • B65H2557/23—Recording or storing data
    • 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
    • B65H2701/12—Surface aspects
    • B65H2701/124—Patterns, marks, printed information
    • B65H2701/1241—Patterns, marks, printed information register marks

Definitions

  • the present invention relates to a method for determining and verifying the number of sheets forming a ream of paper made in an automatic machine for packaging reams of paper.
  • the reams formed by a plurality of sheets of paper are produced and packaged by automatic machines, which take the sheets of paper from a pile situated on a bench or pallet near the machine.
  • the sheets of paper are withdrawn m blocks formed by a number of sheets as near as possible to the number of sheets which must form a ream.
  • a ream taken by way of example referred to hereinafter, is formed by 250 sheets.
  • the thickness corresponding to the predetermined number of sheets is determined manually or by a placing a selecting element along the vertical extension of the pile.
  • the operator separates one by one the blocks to form reams, making reference to suitable countermarks placed during the preparation of the pile of sheets between the last sheet of a pack aimed at forming a ream and the first sheet of a pack situated below and aimed at forming a subsequent ream.
  • the pallet is placed on an elevator, so that after each ream has been withdrawn, the pallet is automatically moved upwards.
  • the selection element usually includes a blade or a wedge body, which is introduced between the sheets thus separating a block aimed at forming a ream
  • the blade or the wedge is placed m the ream separation area automatically or manually by an operator
  • the operator places manually the separation element m the region of the above mentioned countermarks, separating the blocks one after another
  • the reams are separated by a suitable group
  • the group features a blade and moves horizontally to insert the blade into the pile of sheets Then the blade lifts a pack of sheets aimed at forming a ream.
  • pushing means are introduced into the so obtained gap and move the ream out the pile, pushing it toward the machine, to be packed
  • the ream lifting and translation are automated
  • the operator's task if the size of the reams to be formed is to be changed, is to move manually the blade with respect to the group according to the new thickness, or to establish the opening value of the ream separating member, m case of automatic procedure
  • the Italian publication B096A 000394 describes a device for verifying the size of formed reams of paper, which uses two feeler pin aimed at measuring the ream height, which is later compared with a sample value, which varies in relation to the predetermined size of the ream.
  • the ob ect of the present invention is to propose a machine which allows to select a number of sheets as correct as possible to form a ream, without using operators and without long, complicated and imprecise operations of adjusting different sizes of reams, each time it is required.
  • Another object of the present invention is to propose a method, which allows to select a number of sheets for forming reams, counting them each time n an extremely short time, thus without reducing the number of reams produced m a unit time
  • a further object of the present invention is to propose a method, which allows to verify the number of sheets selected to form the ream, thus allowing to correct possible surpluses or lacks n the block formed for that purpose.
  • a still further object of the present invention is to propose a method according to which the system is automatically controlled to adjust the number of sheets each time forming a ream, on the basis of the number of sheets actually selected previously. This will make possible to eliminate an error trend without the necessity to stop the machine .
  • a method for selecting and verifying the number of sheets forming a selected ream of paper on an automatic machine for packaging reams of paper said method including, after preparation of a pile of sheets a sequence of steps, according to which a pack of sheets constituting an initial ream is separated from a pile in a selection station each time and fed to a subsequent station of said packaging machine; the method includes: a) acquiring, by said machine, data necessary to define the nominal number of sheets which constitute a definite ream, the reference weight and a selection height for a definite ream to be formed and recording said data in a control unit; b) preparing selection means to select said initial ream with said selection height ; c) starting a repetitive selection cycle of said reams including: c.i) selection of a new initial ream and transferring said initial ream to a checking station; en) weighing said initial ream, so as to obtain the
  • step a) of the method before step a) of the method, another step is performed including counting said sheets when forming the pile and applying marks to a side of a first predetermined number of said sheets said marks being separated by a second predetermined number of sheets
  • the marks are used to effect an optic detection of the number of sheets selected for each ream.
  • a combination of weight and optic checks are performed, which allow to adjust the number of selected sheets on the basis of the same check.
  • Figure 1 is a schematic view of mam stations of the initial part of an automatic machine for packaging reams, set up to carry out the proposed method
  • Figure 2 shows a flow chart including a sequence of the main steps of the proposed method
  • Figure 3 shows a functional and systematic diagram of an example embodiment of the invention to carry out the proposed method
  • the object of the method later described m detail is not only to determine a correct number of sheets forming a ream, i.e. corresponding to the number of sheets fixed for each ream, but also to verify possible trends which can cause a progressively increasing difference between the actual number of sheets and the requested one.
  • the verify can be performed in different ways, which include comparing the weight of a ream and a weight of each sheet calculated statistically and multiplied by the number of sheets forming a ream. Another way would include measuring the ream thickness by optic instruments and data processing systems, so as to translate the obtained data into corresponding numbers of sheets. Both ways can be performed m different combinations.
  • the method for determining and verifying the number of sheets forming a ream of paper is performed by an automatic machine for packaging reams of paper, schematically shown m Figure 1 and indicated with reference number 1.
  • the reams RI are formed by taking homogenous packs of sheets from a pile 2 placed on a support or a pallet 3.
  • the pallet is placed on an elevator, m such a way that its position is automatically moved upwards after that each pack of sheets has been withdrawn, according to known techniques.
  • the sheets are selected by known devices, adapted to carry out the method claimed hereinafter.
  • the withdrawing member includes a blade 6 or a wedge body, which is introduced between the sheets, thus separating a pack of sheets which are to constitute a ream being formed, like m techniques already known m the field.
  • the blade 6 or wedge body is located m the pack separation area automatically by a known device, not shown, controlled by an electronic control unit, or processing unit, which manages the whole machine operation, schematically shown in Figure 3 and indicated with 100.
  • the separation device of known type is capable of defining a constant thickness of the pack of sheets to be separated from the pile each time a new ream is being formed. Afterwards, the pack of sheets, aimed at forming a ream R, removed from the pile 2 in the separation station 10, is verified as regards the number of sheets, and then fed to a subsequent section 20 of the packaging machine 1. With reference to Figure 3, to carry out the proposed method, the following operations are preferably performed already during the preparation of the pile of sheets, from which the reams to be packaged are removed .
  • the height HS of the support or pallet 3 is preferably measured directly, or it is known from the constructive characteristics of the support .
  • the same consideration relates to the weight of the empty support or pallet 3.
  • Checking means 12 can be provided for detecting and correcting possible errors resulting from an accidental cut-off of one or more strips of paper 11.
  • the marks on the side of the pile 2 are applied on the side of the groups of sheets of paper as they are produced, by printing device 13 , suitably controlled by a control device 14
  • the control device 14 s connected to the checking means 12, so as to take into account possible lacks of sheets and, consequently, mark exactly the sheets which are needed each time to compose the fixed number.
  • the marks 8 extend horizontally for a distance long enough to be clearly noted by an optic reading device e g telecamera or another type of reader
  • the marks extend vertically along a predetermined fixed number of sheets Nl , e g 20, and are vertically spaced apart by a predetermined fixed number of sheets N2, e.g. 30.
  • the measured height and weight of the pile 2 on the support can be inserted into the control unit by the operator, by a keyboard connected to a special terminal, neither of them shown, as commonly known, or sent to the control unit by direct connection, where this could be possible
  • the height and weight of the support 3 can be either inserted by the operator, or read directly on the label 9, by a suitable reader of known type connected to the control unit 100
  • the operator inserts, through the above mentioned keyboard, the nominal number of sheets NO necessary to form each ream R, e.g. 250, as said in the introductory statement. Therefore, knowing the height and the weight of the pile 2, as well as the total number NTP of sheets forming the pile, it is possible to obtain a nominal value of weight and height of each sheet, defined statistically Having the above values, and having set the nominal number NO of sheets for each ream, the control unit is able to determine and record the weight PO and the selection height HO of an initial ream RI
  • the point, which the blade of the selection member is to be introduced into the pile 2, is set in relation to the height HO, by acting on adjustment servomechanisms, connected to the blade
  • a new initial ream RI whose height corresponds to the correct selection height HO, is taken from the pile 2 in the selection station 10
  • the weight PR of the new ream RI is verified m the checking station W.
  • the possible difference between the two values is compensated for by adding or removing sheets relation to the result of the weight check just performed.
  • the sheets are removed or added by a suitable device 25, which will not be described, since it can be of known type, and which adds or removes respectively the lacking or exceeding sheets, thus obtaining a definite ream R
  • the number NS of corrected reams is increased and recorded a corresponding counting device including e.g. one of registers of the control unit 100
  • the data in the control unit correspondmg to the selection height HO of the ream RI and the reference weight PO are corrected accordingly.
  • control unit 100 allows to correct the error trends before it provokes an unacceptable variation of the number of selected sheets with respect to the nominal value NO .
  • Another embodiment of the previously described method allows to obtain bigger precision and certainty defining the number of sheets to be selected, using the marks reported on the side of the pile 2 during the formation thereof.
  • the number NR of sheets constituting a ream is actually counted by an optic reader 5.
  • the optic reader 5 can include a telecamera or another known reading device, which frames the side of the selected ream Rl and sends an image to the control unit 100
  • the control unit 100 processes the received data by a special software.
  • the top of the ream Rl is distant from the upper border of the upper entire mark by a number Nx of sheets, while the bottom of the ream Rl is distant from the lower border of the lower entire mark by a number Ny of sheets (no partial marks) ;
  • the top of the ream Rl divides a mark situated over the upper entire mark, while the bottom of the ream Rl is distant from the lower border of the lower entire mark by a number Ny of sheets (one partial mark at the top) ;
  • the top of the ream Rl is distant from the upper border of the upper entire mark by a number Nx of sheets, while the bottom of the ream Rl divides a mark situated under the lower entire mark (one partial mark at the bottom) .
  • the telecamera and the software processing the image taken thereby are able to define the measures of the intervals which separate the lower and upper borders of respectively lower and upper marks, from the bottom to the top of the ream Rl .
  • the ream is composed of 259 sheets (220 + 15 + 24) .
  • a partial mark is situated at the top of the ream.
  • the software counts thirty sheets, i.e. the ones comprised between the upper border of the upper entire mark and the lower border of the top partial mark.
  • the number of sheets resulting from the comparison of the extension of the partial mark with the extension of one of the entire marks, is added to the number of sheets counted by the program.
  • the total number of sheets in the ream Rl is 259 (220 + 5 + 30 + 4) .
  • the software adds immediately sixty sheets to the already obtained sum (two intervals between the entire and partial marks) .
  • the previous procedure like for the two partial marks, is repeated, counting e.g. eight sheets in the top partial mark and six sheets in the bottom partial mark.
  • the total sum is 244 sheets (170 + 60 + 8 + 6) .
  • the fourth case corresponds to the second case with the reversed situation top - bottom of the ream.
  • the just described optic check is alternated with a fixed number of checks performed only by weighing.
  • This mixed procedure is to use the optic check only as correction of those data used for the usual reams weight check.
  • the interval of actuation of the optic check can be set by an algorithm, instead of a fixed number of reams weight checks.
  • the algorithm in relation to various parameters sets the moment, in which the optic check should be actuated, instead of, or after the weight check.
  • the control unit 100 sets a correction of reference parameters recorded therein .
  • the ream R is weighed again after the correction of the number of sheets forming it, and the reference weight value PO is corrected correspondingly.
  • the reference height value H9 of the ream is corrected and the selection member 6 is relocated correspondingly.
  • Figure 2 shows a simplified flow chart related to the steps substantially carrying out the proposed method accordmg to the preferred embodiment.
  • the data required by the control unit 100 to calculate the reference weight P0 and reference height HO of the ream Rl are keyed m by the operator or sent directly by an interface (not shown) .
  • the operator can calculate the reference values manually and then key the data into the control unit 100. This means that the operator takes a ream formed by a required number of sheets, e.g. 250, counting them manually one by one or by an automatic counting device.
  • the operator measures the weight and the height of the ream in a way known to those skilled m the field, so that the data correspond as much as possible to the real situation of selected reams. Finally, the operator keys in the obtained data into the control unit 100 by already mentioned keyboard.
  • the floppy disk is joined to the pile 2, or to the lot of produced piles.
  • the operator introduces the floppy disk into a suitable floppy drive of the machine 1.
  • the proposed method allows to use the marks 8 applied to the side of the pile, and consequently, also to the selected reams Rl, to transfer different information to the control unit 100, so as to allow more and more precise and rapid defining of the number of sheets actually removed from the pile 2. It is enough to write, according to known techniques, a coding on the mark 8.
  • the coding will be read by the optic reader 5 and interpreted by the control unit 100.
  • the described method allows to remove from the pile the correct number of sheets necessary to form a ream, without the operator and without long, complicated and imprecise adjusting operations, in case different reams sizes are required.
  • the selected sheets forming the reams are counted each time extremely rapidly, without reducing the number of reams produced in a unit time.
  • the checking of the number of selected sheets forming a ream allows to correct possible surpluses or lacks in an automatic way.
  • the proposed method allows to intervene automatically on the sheets selection system, so as to adapt the quantity of removed sheets in the basis of number of sheets actually removed previously, and therefore, to eliminate a possible error trends.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Forming Counted Batches (AREA)
  • Sorting Of Articles (AREA)

Abstract

Selon ce procédé, le nombre nominal de feuilles (N0) correspondant aux rames (R) définies devant être formées est introduit dans une machine destinée à sélectionner les rames (1). La machine (1) regroupe les données nécessaires pour déterminer un poids de référence (P0) et une hauteur sélectionnée (H0). Grâce à une vérification ultérieure du poids (PR) de la rame sélectionnée (R1), on peut corriger les manques ou les surplus en ajoutant ou en enlevant des feuilles. La vérification du poids (PR) de la rame (R1) peut être associée à ou remplacée par un comptage des feuilles de la rame sélectionnée (R1) par détection optique de marques (8) formées sur le côté de la pile (2) de laquelle les feuilles sont retirées. Les marques (8) sont formées sur un certain nombre de feuilles et séparées par un nombre de feuilles prédéterminé, ce qui permet le comptage lorsqu'elles sont introduites dans la machine (1).
EP00973139A 1999-11-16 2000-11-14 Procede permettant de determiner et de verifier le nombre de feuilles de papier formant une rame de papier dans une machine servant a selectionner des rames Withdrawn EP1237807A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITBO990619 1999-11-16
IT1999BO000619A IT1311392B1 (it) 1999-11-16 1999-11-16 Metodo per la determinazione e la verifica del numero di foglicomponenti una risma di carta su una macchina per la selezione
PCT/IB2000/001655 WO2001036310A1 (fr) 1999-11-16 2000-11-14 Procede permettant de determiner et de verifier le nombre de feuilles de papier formant une rame de papier dans une machine servant a selectionner des rames

Publications (1)

Publication Number Publication Date
EP1237807A1 true EP1237807A1 (fr) 2002-09-11

Family

ID=11344348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00973139A Withdrawn EP1237807A1 (fr) 1999-11-16 2000-11-14 Procede permettant de determiner et de verifier le nombre de feuilles de papier formant une rame de papier dans une machine servant a selectionner des rames

Country Status (3)

Country Link
EP (1) EP1237807A1 (fr)
IT (1) IT1311392B1 (fr)
WO (1) WO2001036310A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1016967A3 (nl) * 2006-01-26 2007-11-06 Igepa Belux Nv Werkwijze voor het inpakken van papier, karton of dergelijke en inrichting daarbij toegepast.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0678150B2 (ja) * 1984-07-30 1994-10-05 新王子製紙株式会社 シ−ト束分離装置
JPS6251529A (ja) * 1985-08-28 1987-03-06 Hitachi Ltd 紙葉類取扱い装置
JPH06247609A (ja) * 1993-02-24 1994-09-06 Hitachi Chem Co Ltd 定尺シートの丁合い方法
IT1280258B1 (it) * 1995-10-31 1998-01-05 Wrapmatic Spa Dispositivo di controllo e regolazione di formati in apparecchiature di selezione di grandi risme sfuse.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0136310A1 *

Also Published As

Publication number Publication date
IT1311392B1 (it) 2002-03-12
WO2001036310A1 (fr) 2001-05-25
ITBO990619A0 (it) 1999-11-16
ITBO990619A1 (it) 2001-05-16

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