METHOD OF MAKING A PISTON FOR A DISPENSER
First Claim
1. A method of making a piston for a dispenser adapted to dispense a liquid onto a substrate, comprising:
- molding a base portion of the piston by injecting a first curable material in a first shot of a molding operation; and
molding a skirt portion to an outer periphery of the base portion by injecting a second curable material during a second shot of the molding operation.
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Accused Products
Abstract
A dispenser for dispensing a liquid onto a substrate includes a dispenser body having an output and a reservoir in fluid communication with the output, the reservoir being defined by a wall and adapted to hold a supply of liquid to be dispensed. A piston is disposed in the reservoir and adapted to pressurize the liquid so that an amount of liquid is dispensed from the output of the dispenser. The piston includes a base portion having an outer periphery and having a first hardness, and a skirt portion integrally molded to the outer periphery of the base portion and having a second hardness lower than the first hardness. A two-shot molding operation may be used to form the piston with the base portion being, for example, formed in the first shot of the molding operation and the skirt portion being formed in the second shot of the molding operation.
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Citations
11 Claims
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1. A method of making a piston for a dispenser adapted to dispense a liquid onto a substrate, comprising:
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molding a base portion of the piston by injecting a first curable material in a first shot of a molding operation; and molding a skirt portion to an outer periphery of the base portion by injecting a second curable material during a second shot of the molding operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of making a piston for a dispenser adapted to dispense a liquid onto a substrate, comprising:
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molding a first portion of the piston by injecting a curable material including a first hardness in a first shot of a molding operation; and molding a second portion of the piston to the first portion by injecting a curable material including a second hardness during a second shot of the molding operation, the second hardness being different from the first hardness. - View Dependent Claims (11)
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Specification