EP0850783A1 - Cover with a rounded back - Google Patents

Cover with a rounded back Download PDF

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Publication number
EP0850783A1
EP0850783A1 EP97402672A EP97402672A EP0850783A1 EP 0850783 A1 EP0850783 A1 EP 0850783A1 EP 97402672 A EP97402672 A EP 97402672A EP 97402672 A EP97402672 A EP 97402672A EP 0850783 A1 EP0850783 A1 EP 0850783A1
Authority
EP
European Patent Office
Prior art keywords
punch
polypropylene
flat surfaces
relief
article
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.)
Ceased
Application number
EP97402672A
Other languages
German (de)
French (fr)
Inventor
Gérard Viquel
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.)
Viquel SAS
Original Assignee
Viquel SAS
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 Viquel SAS filed Critical Viquel SAS
Publication of EP0850783A1 publication Critical patent/EP0850783A1/en
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42F—SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
    • B42F13/00—Filing appliances with means for engaging perforations or slots
    • B42F13/0006—Covers for loose-leaf binders
    • B42F13/0013—Covers for loose-leaf binders made of special materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D3/00—Book covers
    • B42D3/02—Book covers made of special materials

Definitions

  • the present invention relates to a classification article, such as a ring blanket, of the type comprising two flat surfaces articulated on a back, said surfaces flat and said back being in one piece in polypropylene.
  • Filing articles of this type which can constitute a simple cover, can also understand more complicated items, for example binders closed by flaps hinged on edges of flat surfaces.
  • a disadvantage of these known classification articles is the completely flat shape, without relief or decoration, of the back which gives a poor appearance to the product.
  • the present invention therefore aims to provide a new classification article not showing this disadvantage of known items
  • the classification article according to the invention is characterized in that said back is curved and / or provided with relief and / or hollow drawings.
  • the invention also relates to the manufacture of a filing item, such as a ring blanket, of type comprising two flat surfaces articulated on a back, said flat surfaces and said back being of a single polypropylene piece cut and cold grooved in a polypropylene sheet, characterized in that it heats said back evenly at a temperature above the plastic deformation or softening temperature polypropylene but below its temperature of fusion, we place the part with the preheated back between a fixed matrix, comprising an imprint of the curvature bending and / or relief and / or intaglio drawings form on the back of the article, and a movable punch provided a head comprising said curvature and / or said drawings to be obtained, the movable punch is brought closer to said imprint, the trapped part is kept under pressure between the die and the punch, we spread the punch and we remove the part thus formed.
  • a filing item such as a ring blanket, of type comprising two flat surfaces articulated on a back, said flat surfaces and said back being
  • the punch and / or the die are cooled by example using a water cooling system refrigerated.
  • the manufacture of a classification article in accordance with the invention adds to a conventional cutting operation and cold creasing, one piece of polypropylene, one step preheating followed by a setting stage form.
  • part plane 1 comprising two plane surfaces 2 articulated on a back 3 along edges 4 formed by creasing.
  • the part 1 thus formed is arranged flat with its back 3 held between two sources of intense heat 5 and 6 (figure 1) equidistant from the back 3.
  • sources 5 and 6 are advantageously constituted by two tubes of the "quartz” type 2000 watt linear iodine "minimum length equal to the length of the back.
  • Sources 5 and 6 must be perfectly aligned between them and focused on the axis of the back 3, so as to obtain a as uniform heating as possible of this back 3, without affect the flat surfaces 2 of room 1. This can be controlled by the opening of the radiation field of tubes 5 and 6 in their respective 5 'and 6' supports.
  • Sources 5 and 6 are supplied for a time depending on their distance from part 1, sufficient for back 3 to reach a temperature higher than its softening point or temperature plastic deformation, but below its temperature of fusion. This duration is advantageously controlled by a timer triggered by a process cycle signal.
  • the part 1 thus heated is quickly transported to a shaping station shown in Figure 2.
  • the part 1 is arranged opposite a fixed matrix 7 comprising a recessed imprint 8 opposite which is positioned back 3 preheated part 1.
  • the punch 9 can be lowered and then raised by an appropriate device such as than an actuator 11.
  • the punch 9 is then reassembled by the jack 11 and the piece 1 is recovered, possibly by hand, from preferably using ejectors.
  • FIG. 1 can for example take the form of equidistant transverse ribs in relief, the whole giving a noble aspect to the classification article.
  • This aspect can be reinforced or supplemented by markings, for example by hot printing.

Landscapes

  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

An article for filing, such as a ring binder, forming two flat surfaces (2) hinged (4) to a spine (3) all made in one piece from polypropylene has the spine curved and/or provided with relief or impressed designs. The cutout and grooved polypropylene sheet (1) has the spine uniformly heated to above its plastic deformation temperature but below its melting point. The preheated spine is placed between the formers (8,9) of a press forming the curved shape and design impressions required.

Description

La présente invention concerne un article de classement, tel qu'une couverture à anneaux, du type comprenant deux surfaces planes articulées sur un dos, lesdites surfaces planes et ledit dos étant d'une seule pièce en polypropylène.The present invention relates to a classification article, such as a ring blanket, of the type comprising two flat surfaces articulated on a back, said surfaces flat and said back being in one piece in polypropylene.

Les articles de classement de ce type, qui peuvent constituer une simple couverture, peuvent également comprendre des articles plus compliqués, par exemple des classeurs fermés par des rabats articulés sur des bords des surfaces planes.Filing articles of this type, which can constitute a simple cover, can also understand more complicated items, for example binders closed by flaps hinged on edges of flat surfaces.

Ces articles sont obtenus par découpage à froid et rainage simultané des arêtes d'articulations dans une feuille de polypropylène.These articles are obtained by cold cutting and creasing joint edges in a sheet of polypropylene.

Un inconvénient de ces articles de classement connus est la forme totalement plate, sans relief ni décor, du dos qui donne un aspect pauvre au produit. A disadvantage of these known classification articles is the completely flat shape, without relief or decoration, of the back which gives a poor appearance to the product.

La présente invention vise en conséquence à fournir un nouvel article de classement ne présentant pas cet inconvénient des articles connusThe present invention therefore aims to provide a new classification article not showing this disadvantage of known items

A cet effet, l'article de classement selon l'invention est caractérisé en ce que ledit dos est bombé et/ou muni de dessins en relief et/ou en creux.To this end, the classification article according to the invention is characterized in that said back is curved and / or provided with relief and / or hollow drawings.

L'invention a également pour objet la fabrication d'un article de classement, tel qu'une couverture à anneaux, du type comprenant deux surfaces planes articulées sur un dos, lesdites surfaces planes et ledit dos étant d'une seule pièce en polypropylène découpée et rainée à froid dans une feuille de polypropylène, caractérisé en ce qu'on chauffe ledit dos uniformément à une température supérieure à la température de déformation plastique ou de ramollissement du polypropylène mais inférieure à sa température de fusion, on dispose la pièce avec le dos préchauffé entre une matrice fixe, comportant une empreinte de la courbure de bombage et/ou des dessins en relief et/ou en creux à former sur le dos de l'article, et un poinçon mobile muni d'une tête comportant ladite courbure et/ou lesdits dessins à obtenir, on rapproche le poinçon mobile de ladite empreinte, on maintient sous pression la pièce emprisonnée entre la matrice et le poinçon, on écarte le poinçon et on enlève la pièce ainsi formée.The invention also relates to the manufacture of a filing item, such as a ring blanket, of type comprising two flat surfaces articulated on a back, said flat surfaces and said back being of a single polypropylene piece cut and cold grooved in a polypropylene sheet, characterized in that it heats said back evenly at a temperature above the plastic deformation or softening temperature polypropylene but below its temperature of fusion, we place the part with the preheated back between a fixed matrix, comprising an imprint of the curvature bending and / or relief and / or intaglio drawings form on the back of the article, and a movable punch provided a head comprising said curvature and / or said drawings to be obtained, the movable punch is brought closer to said imprint, the trapped part is kept under pressure between the die and the punch, we spread the punch and we remove the part thus formed.

De préférence, pour réduire la durée d'application du poinçon, on refroidit le poinçon et/ou la matrice, par exemple au moyen d'un circuit de refroidissement par eau réfrigérée.Preferably, to reduce the duration of application of the punch, the punch and / or the die are cooled by example using a water cooling system refrigerated.

L'invention sera bien comprise à la lecture de la description suivante en référence au dessin annexé dans lequel :

  • la figure 1 illustre schématiquement une étape de préchauffage du procédé selon l'invention et
  • la figure 2 illustre schématiquement une étape subséquente de mise en forme.
    • The invention will be clearly understood on reading the following description with reference to the accompanying drawing in which:
  • FIG. 1 schematically illustrates a step of preheating the method according to the invention and
  • Figure 2 schematically illustrates a subsequent shaping step.

    • La fabrication d'un article de classement conforme à l'invention ajoute à une opération classique de découpage et rainage à froid, d'une pièce de polypropylène, une étape préliminaire de préchauffage suivie d'une étape de mise en forme.The manufacture of a classification article in accordance with the invention adds to a conventional cutting operation and cold creasing, one piece of polypropylene, one step preheating followed by a setting stage form.

    Après découpage et rainage à froid, on obtient une pièce plane 1 comprenant deux surfaces planes 2 articulées sur un dos 3 le long d'arêtes 4 formées par le rainage.After cutting and cold creasing, we obtain a part plane 1 comprising two plane surfaces 2 articulated on a back 3 along edges 4 formed by creasing.

    La pièce 1 ainsi constituée est disposée à plat avec son dos 3 maintenu entre deux sources de chaleur intense 5 et 6 (figure 1) équidistantes du dos 3. Ces sources 5 et 6 sont avantageusement constituées par deux tubes du type "quartz iode linéaire" de 2000 watts dont la longueur est au moins égale à la longueur du dos.The part 1 thus formed is arranged flat with its back 3 held between two sources of intense heat 5 and 6 (figure 1) equidistant from the back 3. These sources 5 and 6 are advantageously constituted by two tubes of the "quartz" type 2000 watt linear iodine "minimum length equal to the length of the back.

    Les sources 5 et 6 doivent être parfaitement alignées entre elles et axées sur l'axe du dos 3, de manière à obtenir un chauffage le plus uniforme possible de ce dos 3, sans affecter les surfaces planes 2 de la pièce 1. Ceci peut être contrôlé par l'ouverture du champ de rayonnement des tubes 5 et 6 dans leur support 5' et 6' respectif.Sources 5 and 6 must be perfectly aligned between them and focused on the axis of the back 3, so as to obtain a as uniform heating as possible of this back 3, without affect the flat surfaces 2 of room 1. This can be controlled by the opening of the radiation field of tubes 5 and 6 in their respective 5 'and 6' supports.

    Les sources 5 et 6 sont alimentées pendant un temps dépendant de leur écartement par rapport à la pièce 1, suffisant pour que le dos 3 atteigne une température supérieure à son point de ramollissement ou température de déformation plastique, mais inférieure à sa température de fusion. Cette durée est avantageusement commandée par une minuterie déclenchée par un signal du cycle du processus.Sources 5 and 6 are supplied for a time depending on their distance from part 1, sufficient for back 3 to reach a temperature higher than its softening point or temperature plastic deformation, but below its temperature of fusion. This duration is advantageously controlled by a timer triggered by a process cycle signal.

    La pièce 1 ainsi réchauffée est rapidement transportée à un poste de mise en forme représenté à la figure 2. La pièce 1 est disposée en regard d'une matrice fixe 7 comportant une empreinte en creux 8 en regard de laquelle est positionné le dos 3 préchauffé de la pièce 1.The part 1 thus heated is quickly transported to a shaping station shown in Figure 2. The part 1 is arranged opposite a fixed matrix 7 comprising a recessed imprint 8 opposite which is positioned back 3 preheated part 1.

    Un poinçon mobile 9, dont la tête 10 comporte un relief complémentaire de l'empreinte 8, est disposé au-dessus du dos 3 en regard de l'empreinte 8. Le poinçon 9 peut être abaissé puis relevé au moyen d'un dispositif approprié tel qu'un vérin 11.A movable punch 9, the head 10 of which has a relief complementary to the imprint 8, is arranged above the back 3 opposite the imprint 8. The punch 9 can be lowered and then raised by an appropriate device such as than an actuator 11.

    A la fin de la descente du vérin 11, le dos 3 de la pièce 1 est déformé plastiquement, par la tête 10 du poinçon 9, dans l'empreinte 8 et, en fin de course, est emprisonné entre la tête 10 et l'empreinte 8. Cet emprisonnement est maintenu quelques secondes sous une pression de, par exemple, 8 bars, jusqu'à obtention et conservation de la déformation voulue correspondant au refroidissement de la pièce 1 au-dessous du point de ramollissement du polypropylène. Ce temps est avantageusement réduit par un refroidissement du poinçon 9 et/ou de la matrice 7, par exemple au moyen de circuits de refroidissement par eau réfrigérée.At the end of the descent of the jack 11, the back 3 of the part 1 is deformed plastically, by the head 10 of the punch 9, in footprint 8 and, at the end of the race, is imprisoned between head 10 and imprint 8. This imprisonment is kept under pressure for a few seconds, example, 8 bars, until obtaining and keeping the desired deformation corresponding to the cooling of the piece 1 below the softening point of polypropylene. This time is advantageously reduced by a cooling of the punch 9 and / or of the die 7, by example using water cooling systems refrigerated.

    Le poinçon 9 est ensuite remonté par le vérin 11 et la pièce 1 est récupérée, éventuellement à la main, de préférence à l'aide d'éjecteurs.The punch 9 is then reassembled by the jack 11 and the piece 1 is recovered, possibly by hand, from preferably using ejectors.

    En plus ou à la place de la forme bombée du dos 3, on peut obtenir des dessins très variés, en relief et/ou en creux.In addition to or instead of the curved shape of the back 3, one can obtain very varied drawings, in relief and / or intaglio.

    Ces dessins peuvent par exemple prendre la forme de nervures transversales équidistantes en relief, l'ensemble donnant un aspect noble à l'article de classement. Cet aspect peut être renforcé ou complété par des marquages, par exemple par impression à chaud.These drawings can for example take the form of equidistant transverse ribs in relief, the whole giving a noble aspect to the classification article. This aspect can be reinforced or supplemented by markings, for example by hot printing.

    Claims (6)

    Article de classement, tel qu'une couverture à anneaux, du type comprenant deux surfaces planes (2) articulées (4) sur un dos (3), lesdites surfaces planes (2) et ledit dos (3) étant d'une seule pièce (1) en polypropylène,
    caractérisé en ce que ledit dos (3) est bombé et/ou muni de dessins en relief et/ou en creux.    Filing article, such as a ring blanket, of the type comprising two flat surfaces (2) articulated (4) on a back (3), said flat surfaces (2) and said back (3) being in one piece (1) polypropylene,
    characterized in that said back (3) is curved and / or provided with relief and / or hollow drawings.         Article de classement selon la revendication 1,
    caractérisé en ce qu'il comporte un dos (3) bombé et muni de nervures transversales équidistantes en relief.    Classification article according to claim 1,
    characterized in that it comprises a rounded back (3) and provided with transverse ribs equidistant in relief.         Procédé de fabrication d'un article de classement, tel qu'une couverture à anneaux, du type comprenant deux surfaces planes (2) articulées (4) sur un dos (3), lesdites surfaces planes (2) et ledit dos (3) étant d'une seule pièce (1) en polypropylène découpée et rainée à froid dans une feuille de polypropylène,
    caractérisé en ce qu'on chauffe ledit dos (3) uniformément à une température supérieure à la température de déformation plastique ou de ramollissement du polypropylène mais inférieure à sa température de fusion, on dispose la pièce (1) avec le dos (3) préchauffé entre une matrice fixe (7), comportant une empreinte (8) de la courbure de bombage et/ou des dessins en relief et/ou en creux à former sur le dos (3) de l'article, et un poinçon mobile (9) muni d'une tête (10) comportant ladite courbure et/ou lesdits dessins à obtenir, on rapproche le poinçon mobile (9) de ladite empreinte (8), on maintient sous pression la pièce (1) emprisonnée entre la matrice (7) et le poinçon (9), on écarte le poinçon (9) et on enlève la pièce ainsi formée.    Method for manufacturing a filing article, such as a ring blanket, of the type comprising two flat surfaces (2) articulated (4) on a back (3), said flat surfaces (2) and said back (3) being in one piece (1) of polypropylene cut and cold grooved in a polypropylene sheet,
    characterized in that the said back (3) is heated uniformly to a temperature higher than the plastic deformation or softening temperature of the polypropylene but lower than its melting temperature, the part (1) is placed with the back (3) preheated between a fixed die (7), comprising an imprint (8) of the bending curvature and / or relief and / or hollow drawings to be formed on the back (3) of the article, and a movable punch (9 ) provided with a head (10) comprising said curvature and / or said drawings to be obtained, the movable punch (9) is brought closer to said imprint (8), the part (1) trapped between the matrix (7) is kept under pressure ) and the punch (9), the punch is moved aside (9) and the part thus formed is removed.         Procédé selon la revendication 3,
    caractérisé en ce qu'on refroidit le poinçon (9) et/ou la matrice (7), par exemple au moyen d'un circuit de refroidissement par eau réfrigérée.     Method according to claim 3,
    characterized in that the punch (9) and / or the die (7) is cooled, for example by means of a chilled water cooling circuit.         Procédé selon l'une des revendications 3 et 4,
    caractérisé en ce qu'on règle le temps de chauffage au moyen d'une minuterie.    Method according to one of claims 3 and 4,
    characterized in that the heating time is adjusted by means of a timer.         Procédé selon l'une des revendications 3 à 5,
    caractérisé en ce que, à l'étape de chauffage, on utilise deux sources de chaleur intense (5, 6), par exemple des tubes du type "quartz iode linéaire", disposées de part et d'autre et à égale distance du dos (3).    Method according to one of claims 3 to 5,
    characterized in that, in the heating step, two intense heat sources (5, 6) are used, for example tubes of the "linear iodine quartz" type, arranged on either side and equidistant from the back (3).
    EP97402672A 1996-11-07 1997-11-07 Cover with a rounded back Ceased EP0850783A1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9613581 1996-11-07
    FR9613581A FR2755397B1 (en) 1996-11-07 1996-11-07 ROUND BACK BACK COVER AND MANUFACTURING METHOD THEREOF

    Publications (1)

    Publication Number Publication Date
    EP0850783A1 true EP0850783A1 (en) 1998-07-01

    Family

    ID=9497414

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP97402672A Ceased EP0850783A1 (en) 1996-11-07 1997-11-07 Cover with a rounded back

    Country Status (2)

    Country Link
    EP (1) EP0850783A1 (en)
    FR (1) FR2755397B1 (en)

    Families Citing this family (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2817505A1 (en) * 2000-12-06 2002-06-07 Avery Dennison France Document file or loose-leaf binder, has a weakened zone along part of each cover, parallel to the spine, so it stays open when held by spine

    Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR1482554A (en) * 1965-06-09 1967-05-26 Process for obtaining letters, characters and marks
    US3470290A (en) * 1967-02-28 1969-09-30 Macoid Ind Inc Method of making plastic file folder
    FR2579931A1 (en) * 1985-04-05 1986-10-10 Usiplast Binders reinforced along at least one of their edges by the folding over of material
    FR2628684A1 (en) * 1988-03-15 1989-09-22 Publiaction Sarl Binder for catalogues and magazines - with grooves at centre of polypropylene sheet forming spine

    Patent Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR1482554A (en) * 1965-06-09 1967-05-26 Process for obtaining letters, characters and marks
    US3470290A (en) * 1967-02-28 1969-09-30 Macoid Ind Inc Method of making plastic file folder
    FR2579931A1 (en) * 1985-04-05 1986-10-10 Usiplast Binders reinforced along at least one of their edges by the folding over of material
    FR2628684A1 (en) * 1988-03-15 1989-09-22 Publiaction Sarl Binder for catalogues and magazines - with grooves at centre of polypropylene sheet forming spine

    Also Published As

    Publication number Publication date
    FR2755397A1 (en) 1998-05-07
    FR2755397B1 (en) 1998-11-27

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