EP0066469A1 - Blattverstärker - Google Patents

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Publication number
EP0066469A1
EP0066469A1 EP82302787A EP82302787A EP0066469A1 EP 0066469 A1 EP0066469 A1 EP 0066469A1 EP 82302787 A EP82302787 A EP 82302787A EP 82302787 A EP82302787 A EP 82302787A EP 0066469 A1 EP0066469 A1 EP 0066469A1
Authority
EP
European Patent Office
Prior art keywords
reinforcement
sheet
edges
file
increased thickness
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Withdrawn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
EP82302787A
Other languages
English (en)
French (fr)
Inventor
John Francis Leslie Floyd
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0066469A1 publication Critical patent/EP0066469A1/de
Withdrawn legal-status Critical Current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
    • B42F3/00—Sheets temporarily attached together involving perforations; Means therefor; Sheet details therefor

Definitions

  • This invention relates to reinforcements, which comprise reinforcements for holes in sheets, the reinforcement being stuck to the sheet around the hole to reinforce the sheet against tearing from the hole. Holes are often punched in sheets to be secured in a file provided with a ring binder, the rings passing through holes in the sheets.
  • file reinforcements include'gummed linen washers and self-adhesive vinyl washers. Such reinforcements are manufactured by cutting around the outer perimeter and punching out the central aperture.
  • the edge of the central aperture ⁇ should provide the maximum resistance to tearing.
  • the known forms of file reinforcement are uniform, so that there is no region which provides greater resistance to tearing than any other.
  • a file reinforcement manufactured from sheet plastics material on a high-frequency welding machine.
  • the use of a welding machine to cut out the central aperture and to define the outer perimeter of the reinforcement causes raised inner and outer edges to be formed in the reinforcement, and these edges provide increased resistance to tearing.
  • the reinforcement is preferably made from a sheet or sheets of vinyl plastics material.
  • file reinforcements are annular. According to another aspect of the invention, there is provided a file reinforcement which has an edge which is other than circular, for example, triangular, rectangular or polygonal. Such non-circular shapes may be useful to reinforce the sheet against tearing in a particular direction.
  • a split is required in the reinforcement to enable it to be fitted to a sheet already having a fastening member passing through its hole.
  • the split is an inherent source of weakness in the reinforcement, the manufacture by high-frequency welding according to the present invention causes the edges of the split to be raised and so strengthens the reinforcement.
  • Figure 1 shows a plan of a file reinforcement 10 of preferred shape. It has a square external edge 11 and a circular internal edge 12 defining a central aperture. The two edges are of increased thickness compared to the remainder of the sheet, typically of double thickness as is shown in the section of Figure 2. The remainder of the sheet 14 is typically 0.0075 to 0.0127 cm in thickness.
  • the central aperture is typically 6mm in diameter and the external edges about 15mm long.
  • the width of the raised edge is about 0.3mm.
  • the reinforcement is mass-produced from a matrix arrangement on a sheet of vinyl plastics material.
  • the apparatus of Figure 3 is arranged to form a laminated reinforcement, a white opaque vinyl plastics base sheet 13 being'added to the clear sheet 14 of the reinforcement already described.
  • the base sheet 13 is indicated in dashed lines in Figure 2 and has on its lower side a pressure sensitive adhesive coating protected by a backing sheet.
  • the sheet 14 is supplied on a reel 21 and the sheet 13 on a reel 22.
  • the two sheets are brought into contact over a roller 23 and passed into a welding device 24 which applies heat at about 90° to 110°C and high frequency radiation to the sheet in a square grid pattern to define the outer edges of the reinforcements and a pattern of central rings within each square of the grid to define the inner edges.
  • the head can be moved in synchronism with the sheets or the sheet can be held stationary under the head while the heat and radiation takes place.
  • the intermediate region between the edges 11 and 12 is uniform in thickness, so that the material migrates inwards from the boundary between adjacent reinforcements in the grid pattern to form the outer edge of increased thickness and it also migrates radially outwards from the material within the inner edges so that the individual reinforcements can be easily separated from each other and the waste material in the central aperture can be easily removed.
  • the high frequency radiation also causes lamination of the two sheets 13 and 14.
  • the matrix then passes to a longitudinal slitter 25 where the matrix is cut into a plurality of strips of reinforcements which are then coiled at 26 and packaged.
  • Figure 4 shows an alternative shape of reinforcement.
  • the polygonal shape of the reinforcement is triangular with 45° and 90° angles.
  • This shape leads to as efficient use of materials as the square shape of- Figures 1 and 2, since two such triangles can be placed with their hypotenates 35 together to form a square.
  • the additional dimension of thereinforcement between the central aperture 31 and each 45° corner 32 gives additional resistance to tearing in those directions.
  • the external edge 33 and the internal edge 34 are of double thickness, caused by the welding heat and radiation.

Landscapes

  • Laminated Bodies (AREA)
EP82302787A 1981-05-29 1982-05-28 Blattverstärker Withdrawn EP0066469A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8116420 1981-05-29
GB8116420 1981-05-29

Publications (1)

Publication Number Publication Date
EP0066469A1 true EP0066469A1 (de) 1982-12-08

Family

ID=10522122

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82302787A Withdrawn EP0066469A1 (de) 1981-05-29 1982-05-28 Blattverstärker

Country Status (1)

Country Link
EP (1) EP0066469A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2192587A (en) * 1986-04-23 1988-01-20 Freeway Marketing Limited Self-adhesive laminar elements
US10059141B2 (en) 2014-02-04 2018-08-28 Philip J. Berlinsky Method and device for providing attachment points for a folder

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315683A (en) * 1965-12-10 1967-04-25 Jose M Rodriguez Slit-rim liners
US3473195A (en) * 1968-02-26 1969-10-21 Cupples Container Co Thermoforming apparatus
FR2091479A5 (de) * 1970-05-08 1972-01-14 Stevens A W J T Tools
US3925584A (en) * 1972-08-24 1975-12-09 Daiichi Seiyaku Co Adhesive seal and tape for sealing
DE2512573A1 (de) * 1975-03-21 1976-09-30 Siemens Ag Hochfrequenz-schweisswerkzeug fuer thermoplastische kunststoffe oder thermoplastbeschichtetes papier
GB1601593A (en) * 1978-05-31 1981-11-04 Marcus A Reinforcements for punched paper sheets

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315683A (en) * 1965-12-10 1967-04-25 Jose M Rodriguez Slit-rim liners
US3473195A (en) * 1968-02-26 1969-10-21 Cupples Container Co Thermoforming apparatus
FR2091479A5 (de) * 1970-05-08 1972-01-14 Stevens A W J T Tools
US3925584A (en) * 1972-08-24 1975-12-09 Daiichi Seiyaku Co Adhesive seal and tape for sealing
DE2512573A1 (de) * 1975-03-21 1976-09-30 Siemens Ag Hochfrequenz-schweisswerkzeug fuer thermoplastische kunststoffe oder thermoplastbeschichtetes papier
GB1601593A (en) * 1978-05-31 1981-11-04 Marcus A Reinforcements for punched paper sheets

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2192587A (en) * 1986-04-23 1988-01-20 Freeway Marketing Limited Self-adhesive laminar elements
US10059141B2 (en) 2014-02-04 2018-08-28 Philip J. Berlinsky Method and device for providing attachment points for a folder
US11130362B2 (en) 2014-02-04 2021-09-28 Philip J. Berlinsky Method and device for providing attachment points for a folder

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19831114