Method for the production of pearlescent button blanks
AssigneeKoppers Company, Inc.
InventorCharles H. Williams
Life of this patent
Estimating the term…
Abstract
Method of making pearlescent button blanks by casting and polymerizing a liquid polymerizable resin containing light-reflecting platelets in cavities having the desired form of the button blanks. Pearlescence is imparted to the button blanks by orienting the light-reflecting platelets parallel to the surfaces of the blanks by scuffing a surface of the resin in the cavities during polymerization of the resin. Apparatus for producing buttons by the method of the invention includes a continuous perforated belt and two continuous solid belts that sandwich the perforated belt. The scuffing action for orienting the light-reflecting platelets is produced by sliding the solid belts across the surfaces of the perforated belt.
Claims10
A method for making pearlescent button blanks comprising:
- a. contacting the undersurface of a first flat member having plural perforations therein in the shape of button blanks with an unperforated second flat member to form plural mold cavities in the shape of button blanks,
- b. filling the cavities with a polymerizable resin containing light reflecting platelets,
- c. contacting the upper surface of the resin in the cavities and the first flat member with an unperforated third flat member,
- d. causing linear movement of the three flat members in the same direction but with one of the solid flat members moving at a speed different from the perforated first flat member so as to scuff the surface of the polymerizable resin in contact with the solid flat member that is moving at a different speed thereby causing the light reflecting platelets to orientate parallel to the resin surface being scuffed,
- e. moving the three flat members through a polymerization zone during the scuffing to polymerize the resin while the light reflecting platelets are oriented,
- f. separating the solid flat members from the perforated flat member and ejecting the pearlescent button blanks from the perforated flat member.
A method for producing pearlescent button blanks comprising:
- a. contacting the bottom surface of a first continuous belt having a plurality of perforations therein in the shape of button blanks with the upper surface of a second solid continuous belt thereby forming a plurality of mold cavities in the shape of button blanks,
- b. filling the cavities with a polymerizable resin containing light reflecting platelets,
- c. contacting the upper surface of the perforated belt with the bottom surface of a third solid continuous belt to form a sandwich of the perforated belt between the solid belts,
- d. moving the perforated belt and one of the solid belts in the same direction at different speeds thereby scuffing the surface of the polymerizable resin in contact with the solid belt moving at a different speed thereby causing the light reflecting platelets to orientate parallel to the surface being scuffed,
- e. moving the sandwich of belts through a polymerization zone to polymerize the resin while the light reflecting platelets are oriented,
- f. separating the solid belts from the perforated belt and ejecting the pearlescent button blanks from the perforated belt.
Dependencies are inferred from the claim text.