Inventor

HETTINGA SIEBOLT

38 patents

⚠️ This page may combine multiple inventors who share the name “HETTINGA SIEBOLT”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HETTINGA SIEBOLT

(unassigned)

Method and apparatus for molding a plastic article including injecting based upon a pressure-dominated control algorithm after detecting an indicia of a decrease in the surface area of the melt front

Seat unit and cushion

Heat laminated fabric hinge and method of making same

Method for controlling skin thickness of plastic article made with controlled density

Extruded-in fabric hinge and method of making same

Method of molding a plastic article including injecting based upon a pressure-dominated control algorithm after detecting an indicia of a decrease in the surface area of the melt front

Apparatus for family mold sequential molding

Article of manufacture having computer readable program code for molding an article and method of molding an article by providing computer readable program code

Method of injection molding an article with a cellular density distribution which gradually varies between a high density cellular exterior and a low density cellular interior

Process for making molded-in lamina hinge

Multi-clamp mold and method for clamping an injection mold assembly

Method for molding a plastic article of varied density

Bottle closure

Low pressure method and apparatus for injection molding a plastic article

Method for forming an angled plastic article of varying density

Method for injection molding a plastic part using a film gate

Method of compressing and cooling plastic purge as it emanates from a plastic injection molding machine

Flow regulating assembly for a plastic injection machine

Injection molded plastic article and method of molding same

Metal reinforced plastic article and method of forming same

Self-contained molding apparatus and method for clamping the mold unit of an injection mold apparatus

Plastic article of varying density

Method of making a multiple-layer article having a plastic member with a surface application material effectively bonded thereto

HETTINGA SIEBOLT

Low pressure method for injection molding a plastic article

Method of molding a composite article

Process for making molded-in lamina hinge

Method of molding a vehicle lamp assembly

Process for injection molding a hollow plastic article

Clamping structure and method for clamping the mold unit of a mold injection apparatus

Method for aligning an injection mold with a nozzle at the mold injection station

Method of forming dimensionally stable foamed articles of polyvinyl aromatic resins and resultant product

Method of injection molding a flat deformable laminate

Tilt and rotate base for a display monitor

Method and apparatus for mold injection

Method for molding a laminate

CENTRAL QUALITY IND INC

Power tool accessory table

PARACHEM CORP

Soap leaf sheet dispenser

FOAM MOLDING CORP OF IOWA

Square