Classifications

• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
  • A44B1/00—Buttons
  • A44B1/02—Buttons characterised by their material

Definitions

• the invention concerns the manufacture of buttons for clothing.
• buttons are known to be made from a variety of raw materials like vegatable ivory, horn, claw, bone, wood, metal, plastic materials.
• the most widely used mineral materials include ceramic and vitreous products.
• Ceramic products are made by mixing water with soft minerals, generally clay, then drying and baking them to consolidate the shape.
• Clays are aluminium hydrate silicates in the form of a colloidal gel.
• the vitreous products are silicates of alkaline metals, alkaline-earth metals and other bivalent metals formed by fusion of siliceous sand with oxides and carbonates.
• the main purpose of the invention is to make buttons from raw materials able to create a product of the best quality and appearance at a reasonable cost.
• Subject of the invention is a process for manufacturing buttons for clothing in which the buttons are made from a mixture of mineral materials.
• Colouring pigments can be added t o the mixture in the proportions from 0.5 to 10%.
• the mineral used can be atomized clay.
• Preferred composition is the following:
• buttons of the desired shape are compressed in a tablet press at high pressure to produce buttons of the desired shape.
• the tablet press will have punches for buttons with two or four holes, with shank, without shank or some other type.
• the pellets obtained from this press can be baked and ename lied.
• the mixture may contain 10-20% water and can be mixed in a helical mixture and processed in a mixing mill. From the product so prepared, calenders are used to obtain slices of material rolled into cylindrical shapes by hand.
• the bars are cut into blanks.
• the slices of material are chosen and composed in the cylindrical form so that the blanks, and therefore the buttons, will show the designs and effects desired.
• the next stage is baking and enamelling.
• Another method is to dry the blanks, turn them and
• the mineral material used is a mixture of powdered glass.
• this mixture includes 65-85% of feldspar with 12-22% of CaO and with 2-8% of lubricating waxes.
• the mixture so obtained is pressed in the dies of a tablet press at high pressure to produce the desired shape after which the pellets are given two or four holes with a shank or without one.
• the mixture can be put into preformed dies to get the required shape. This may then be baked and enamelled.
• the blanks, pellets or bodies of mineral material generally, to be made into buttons, can be decorated before or after baking, or enamelled, by placing transfers on them.
• the pellets can also be baked and coated with paint that is tinted by the user.
• the invention offers evident advantages.
• buttons made from the minerals described possess the highest structural quality, withstand washing, retain their shape, withstand ironing and breakage and further have a far better appearance than buttons made by present techniques, colours being stable and decorations the most elegant and varied possible.
• Fig. 1 Perspective of a ceramic blank for buttons.
• Fig.3 Perspective of a button with axial shank composed with a core of elastic plastic material, ceramic crown and glass head.
• Fig.4 Perspective of the ceramic crown for making the button in Fig.3.
• Fig.5 Button composed with a core of elastic plastic material, a glass crown and ceramic ring.
• Fig.6 Button with an axial shaft composed with a core of plastic material and a ceramic crown.
• the discoid blank 10 is made from a mixture 1 1 of atomized clay, coloured pigments, lubricating waxes and is compressed in a tablet press at high pressure.
• the pellet 15 is made from the same mixture as chaC for the blank in Fig. 1, compressed in a tablet press at high pressure having punches able to form the holes 16, 17 and create the shapes 18, 19,20.
• the pellet is then baked and enamelled.
• the button 30 in Fig. 3 comprises a core 31 of plastic material, with elastic fins facing the back of the button said fins having terminal teeth 33, the crown 34 in Fig.4 and a domed glass head 37.
• the upper end of the core can fit into the annular seat
• the crown 34 is made of a mixture of atomized clay, its formula being as follows:
• tints and designs can be formed by hand.
• the piece so obtained is baked, enamelled and baked again.
• the head 37 is made from a mixture of powdered glass comprising 65-85% feldspar, 12-22% of CaO and 2-8% of lubricating waxes.
• This mixture is compressed in dies in a tablet press at high pressure.
• the button is mounted by forcing the fins 32 inside the hole 35 in the crown until the teeth 33 fit inside the rear edge of the crown.
• the head 37 can be associated by applying pressure or by glueing.
• the completed button 40 comprises the plastic core 41 with holes 42 and fins 43 with teeth 44, the ceramic crown 45 with an outwardly decreasing section, and the glass ring 47.
• the completed button 50 comprises the core 51 with fins 52 facing towards the back of the button and connected to an axial bar 56 by ties 57.
• the teeth 53 fit into the glass crown 58.

Landscapes

• Glass Compositions (AREA)
• Powder Metallurgy (AREA)
• Adornments (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=11372623

Family Applications (1)

Country Status (3)

Cited By (2)

Citations (3)

• 1995
  • 1995-11-29 IT IT95MI002493A patent/IT1279086B1/it active IP Right Grant
• 1996
  • 1996-01-10 WO PCT/IT1996/000011 patent/WO1997019610A1/en active Application Filing
  • 1996-01-10 AU AU44953/96A patent/AU4495396A/en not_active Abandoned

Patent Citations (3)

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