Method for making a foam sheet having ventilation holes
OwnerKun-Chung Liuinventor
Life of this patent
Estimating the term…
Abstract
A method for making a foam sheet having ventilation holes includes the steps of: (a) preparing first and second molds, each including lower and upper mold parts separably closed to each other so as to define first and second mold cavities for the first and second molds, respectively, and providing the second mold with a plurality of pins extending into the second mold cavity, the second mold cavity being larger than the first mold cavity; (b) placing a foamable blank into the first mold cavity; (c) foaming the blank in the first mold cavity; (d) placing the blank foamed in step (c) into the second mold cavity, and piercing the blank through the use of the pins; and (e) foaming the blank to form a foam product within the second mold cavity while being pierced by the pins.
Claims12
A method for making a foam sheet having ventilation holes, comprising the steps of:
- (a) preparing first and second molds, each of which includes lower and upper mold parts separably closed to each other so as to define first and second mold cavities for said first and second molds, respectively, and providing said second mold with a plurality of pins extending into said second mold cavity, said second mold cavity of said second mold being larger than said first mold cavity of said first mold;
- (b) placing a foamable blank into said first mold cavity of said first mold;
- (c) foaming said blank in said first mold cavity;
- (d) placing said blank foamed in step (c) into said second mold cavity, and piercing said blank through use of said pins;
- and
- (e) foaming said blank to form a foam product within said second mold cavity while being pierced by said pins.
A method for making a foam sheet having ventilation holes, comprising the steps of:
- (a) preparing a mold including lower and upper mold parts separably closed to each other so as to define a mold cavity, and providing said mold with a plurality of pins extending into said mold cavity;
- (b) placing a foamable blank into said mold cavity of said mold, and piercing said blank through the use of said pins;
- and
- (c) foaming said blank to form a foam product in said mold cavity of said mold while piercing said blank.
Dependencies are inferred from the claim text.