Classifications

• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/05—Particular design of joint configurations
  • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
  • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
  • B29C66/124—Tongue and groove joints
  • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
  • B29C66/12441—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being a single wall
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/05—Particular design of joint configurations
  • B29C66/304—Joining through openings in an intermediate part of the article
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
  • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
  • B29C66/43—Joining a relatively small portion of the surface of said articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
  • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
  • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
  • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
  • B29C66/74—Joining plastics material to non-plastics material
  • B29C66/748—Joining plastics material to non-plastics material to natural products or their composites, not provided for in groups B29C66/742 - B29C66/746
  • B29C66/7486—Paper, e.g. cardboard
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
  • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
  • B29C70/74—Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
  • B29C70/76—Moulding on edges or extremities of the preformed part
  • B29C70/763—Moulding on edges or extremities of the preformed part the edges being disposed in a substantial flat plane
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
  • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
  • B29C70/84—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by moulding material on preformed parts to be joined
  • B29C70/845—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by moulding material on preformed parts to be joined by moulding material on a relative small portion of the preformed parts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42C—BOOKBINDING
  • B42C7/00—Manufacturing bookbinding cases or covers of books or loose-leaf binders
• • 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
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
  • B29K2711/12—Paper, e.g. cardboard
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/705—Books, albums
  • B29L2031/7052—Book covers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/727—Fastening elements

Definitions

• the invention relates to a binder comprising binder boards or sides of paperboard and a back made of thermo ⁇ plastic material and having fastening edges, made in one piece with said back, for the binder boards.
• the invention also relates to a method of manufacturing such a binder.
• binders of the above-mentioned type which are mostly used for storing various types of information sheets, the binder boards are anchored to the fastening edges of the back by hot riveting in a separate operation, through a number of holes along the ' fastening edges of the binder boards.
• the binder boards may also have been provided, in a separate operation, with prefabricated edge protectors of metal or plastic, which have been pinched or glued onto the binder board edge cale
• the anchoring rivets have often been a source of irr-itation due to the fact that the inserted sheets were often marked by the rivets.
• the anchoring procedure by means of hot riveting is rather time-consuming and involves the handling of a number of parts
• the purpose of the invention was therefore to achieve a binder with an anchoring means which removes the dis ⁇ advantages in function and in production of known binders.
• a binder of the type mentioned by way of introduction which is characterized in that the two binder board fastening edges are 'grasped essentially in a U-shape, in section, by the fastening edges of the back of thermoplastic material and are securely anchored to the same by the binder board fastening edges having through—holes in which the thermo ⁇ plastic material forms pillar-shaped bridges joining the legs of the U 0
• the binder boards have along their free edges continuous, thermoplastic edge protectors, essentially U-shaped in section and injection molded against said edges at the same time as the fa edge and which are anchored to the binder boards by their • free edges also having through-holes in which the thermo ⁇ plastic material forms pillar-shaped bridges joining the legs of the U ⁇
• the invention also relates to a method of manufacturin a binder of the type mentioned in the introduction / which i characterized in that the two binder boards 1 of paperboard are provided, at least along the edges which are to be fastened to the back 2 , with a plurality of holes, that the binder boards are inserted into an injection molding machin against a molding tool which, together with the fastening edges of the binder boards, forms the molding cavity for the binder back 2 and .fastening edges 3, that thermoplastic material is then injected into the molding cavity which is thereby filled up, including the holes made in the binder boards, so that after hardening of the thermoplastic
• the binder board are provided in the same step with an edge protector 0
• an edge protector 0 This is achieved according to the invention by providing the two binder boards 1 with holes along their free edges as well, that the binder boards are inserted into an injection molding machine against a molding tool which forms, togethe with the binder board edges, the molding cavity for making the binder back 2, the fastening edges 3 and the binder board edge protectors 4, that thermoplastic material is the injected into the molding chamber which is thereby filled u including the holes made along the edges of the binder boar so that after hardening of the thermoplastic material it forms the back.2 of the binder, fastening edges 3, essential U-shaped in section, grasping around the binder board fastening edges 6, and edge protectors 4, essentially U-shaped in section, around the free edges of the binder
• a binder made in this manner has functional advantages in that it replaces the rivets used previously with a smooth, attractive fastening edge.
• a binder is produced with a back and sides • anchored to the same. All that remains is essentially to mount a mechanism for holding sheets. Thus it is only necessary to handle a limited number of parts, thus reducing costs.
• the back is made in a conventional manner with three flexible portions, one in the center of the back and the other two adjacent to the fastening edges as shown in the accompanying drawings.
• the back, as well as the fastening edges and the protectors, are made of thermoplastic material, preferably polypropylene.
• the binder boards are preferably of stiff paperboard, At the fastening edge, the binder board's are provided with a number of through-holes through which, in the injection molding step, the thermoplastic material forms the pillar- shaped' bridges which join together the two U-legs in the plastic. fastening edge.
• the number of holes and their size can be easily determined by the person skilled in the art.
• the holes, which the outer edges.of . the binder boards are provided with for. the application of the edge protector can be of arbitrary shape and size, the only limitation being that the paperboard edge should not be significantly weakened.
• the distribution of the holes can be quite variable along the edges of the binder board, but there should preferably be holes on either side of the two outer corners of the binder board and at least one additional location along each of the three edges which the protector covers .
• thermoplastic material provides increased coloring possibilities and a pleasantness to the touch which is attractive to the customer
• a special injection molding tool is required for injection molding.
• This tool which is preferably made of tempered steel, is to lie, during injection molding, in contact with the paperboard sides a bit in from their edges and form a closed mold cavity with inlets for the liquid thermoplastic material through ingates.
• the plastic When the plastic is injected it fills the entire mold cavity which is to form the back and fastening edges 3. If an edge protector is applied at the same time, the mold cavity for this is also filled at the same time.
• the bridges or pillars in the hole are injected at the same time in one piece with the U-shape legs.
• thermoplastic material is allowed to harden, to form the back of the binder with the binder boards fastened thereto, possibly provided with an edge protector.
• Fig, 1 shows the opened binder.
• the back 2 is of conventional type with a flexible joint in the middle and flexible joints 5 next to the smooth fastening edge 3 of the back.
• the binder boards 1 are provided with edge protectors 4 of the same thermoplastic material as the back, in this case polypropylene.
• Fig, 2 shows an enlarged view of the binder in Fig.1, along the line II-II with corresponding numerals as in Fig. 1, 3a indicates one of the holes in the binder board fastening edge 6 which are filled out with plastic bridges.
• 4a indicates one of the holes along the outer edge of the paperboard which are filled with plastic to form bridges between the two legs of the protector 4,

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Composite Materials (AREA)
• Manufacturing & Machinery (AREA)
• Injection Moulding Of Plastics Or The Like (AREA)
• Laminated Bodies (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)
• Clamps And Clips (AREA)
• Connection Of Plates (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20337856

Family Applications (1)

Country Status (10)

Cited By (3)

Families Citing this family (1)

Citations (4)

• 1979
  • 1979-04-20 SE SE7903491A patent/SE430673B/sv unknown
• 1980
  • 1980-04-17 FI FI801232A patent/FI801232A7/fi not_active Application Discontinuation
  • 1980-04-17 FR FR8008624A patent/FR2454378A1/fr active Granted
  • 1980-04-18 ES ES490695A patent/ES490695A0/es active Granted
  • 1980-04-21 WO PCT/SE1980/000115 patent/WO1980002259A1/en not_active Ceased
  • 1980-04-21 IT IT12516/80A patent/IT1136181B/it active
  • 1980-04-21 GB GB8040763A patent/GB2062544B/en not_active Expired
  • 1980-04-21 DE DE803041462A patent/DE3041462A1/de not_active Withdrawn
  • 1980-12-10 DK DK527280A patent/DK527280A/da not_active Application Discontinuation
  • 1980-12-18 NO NO803857A patent/NO803857L/no unknown

Patent Citations (4)

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