Steven G Schmidt

US Patent:

59766530, Nov 2, 1999

Filed:

Apr 8, 1997

Appl. No.:

8/835444

Inventors:

Wayne N. Collette - Merrimack NH
Steven L. Schmidt - Merrimack NH
Suppayan M. Krishnakumar - Nashua NH

Assignee:

Continental PET Technologies, Inc. - Florence KY

International Classification:

B32B 108
B32B 2708

US Classification:

428 367

Abstract:

A multilayer preform and container, and method of forming the same, having at least one layer including polyethylene naphthalate (PEN) to provide enhanced oxygen barrier performance and thermal stability. The PEN layer may be a homopolymer, copolymer, or blend of PEN. In a first high-PEN embodiment, the exterior layer contains on the order of 80-100% PEN and 0-20% PET by total weight of the layer, and a core layer of a non-strain hardenable polyester such as PETG. In a second low-PEN embodiment, the exterior layer includes a strain hardenable low-PEN copolymer or blend including on the order of 1-20% PEN and 80-99% PET, and the core layer is a strain-hardenable polyester such as a low-copolymer PET. In a third mid-range PEN embodiment, the exterior wall includes a substantially amorphous PEN copolymer or blend containing on the order of 20-80% PEN and 80-20% of another polyester such as PET, and a strain-hardened core layer of polyester such as a low-copolymer PET. To further enhance the oxygen barrier and thermal stability properties, the core layer may further include a copolymer or blend of PEN.

US Patent:

53018389, Apr 12, 1994

Filed:

Jan 8, 1992

Appl. No.:

7/814923

Inventors:

Steven L. Schmidt - Merrimack NH
Wayne N. Collette - Merrimack NH
Suppayan M. Krishnakumar - Nashua NH

Assignee:

Continental PET Technologies, Inc. - Florence KY

International Classification:

B65D 3528

US Classification:

222 95

Abstract:

A multilayer plastic container for use with either a positive or negative pressure dispensing system, the container having an integral body with an inner layer which readily separates from an outer layer and collapses to dispense a product from the container. The container is formed by blow-molding a multilayer preform, and a bottom aperture is formed in the container for injecting air to separate the inner layer from the outer layer. Preferably, the inner layer is predelaminated during manufacture to facilitate its later separation during use. In the case of vacuum dispening, air inlet vent holes are preferably formed at the points of maximum deformation to prevent collapse of the outer layer.

US Patent:

RE345520, Feb 22, 1994

Filed:

Oct 7, 1991

Appl. No.:

7/772447

Inventors:

Suppayan M. Krishnakumar - Nashua NH
Thomas E. Nahill - Amherest NH
Steven L. Schmidt - Merrimack NH
Wayne N. Collette - Merrimack NH

Assignee:

Continental PET Technologies, Inc. - Florence KY

International Classification:

B65D 2300
B32B 108

US Classification:

438 357

Abstract:

A plastic preform from which a plastic container is blow molded. The preform replaces a three layer preform by providing a preform which is of a five layer construction in the base forming portion thereof and wherein a secondary material which forms the core layer of the three layer preform construction is divided into an inner intermediate layer and an outer intermediate layer by a third injection of material. The third injected material is preferably the same material as the primary material which is first injected. This results in the reduction of the cost of the preform and also provides remaining in the injection nozzle a quantity of the last injected material which is the same as the first injected material for the following preform in the same preform injection mold cavity.

US Patent:

49543768, Sep 4, 1990

Filed:

Dec 30, 1988

Appl. No.:

7/292440

Inventors:

Suppayan M. Krishnakumar - Nashua NH
Thomas E. Nahill - Amherest NH
Steven L. Schmidt - Merrimack NH
Wayne N. Collette - Merrimack NH

Assignee:

Continental Pet Technologies, Inc. - Norwalk CT

International Classification:

B65D 100

US Classification:

428 357

Abstract:

A plastic preform from which a plastic container is blow molded. The preform replaces a three layer preform by providing a preform which is of a five layer construction in the base forming portion thereof and wherein a secondary material which forms the core layer of the three layer preform construction is divided into an inner intermediate layer and an outer intermediate layer by a third injection of material. The third injected material is preferably the same material as the primary material which is first injected. This results in the reduction of the cost of the preform and also provides remaining in the injection nozzle a quantity of the last injected material which is the same as the first injected material for the following preform in the same preform injection mold cavity.

US Patent:

60904607, Jul 18, 2000

Filed:

Jun 1, 1998

Appl. No.:

9/088238

Inventors:

Wayne N. Collette - Merrimack NH
Steven L. Schmidt - Merrimack NH
Suppayan M. Krishnakumar - Nashua NH

Assignee:

Continental PET Technologies, Inc. - Florence KY

International Classification:

B65D 102

US Classification:

428 3691

Abstract:

A method of forming a multi-layer polyester preform and container, particularly suitable for refillable PET carbonated beverage bottles, having an interior layer of high copolymer polyester material which resists hazing in the preform injection stage, and at least one exterior layer of a polyester to achieve enhanced strain-induced crystallization in the exterior layer during blow molding. The container can withstand higher caustic wash temperatures and exhibits reduced flavor carryover from one product to another.

US Patent:

57596565, Jun 2, 1998

Filed:

May 19, 1997

Appl. No.:

8/858132

Inventors:

Wayne N. Collette - Merrimack NH
Steven L. Schmidt - Merrimack NH
Suppayan M. Krishnakumar - Nashua NH

Assignee:

Continental PET Technologies, Inc. - Florence KY

International Classification:

B65D 108
C08G 6316

US Classification:

428 3691

Abstract:

A method of forming a multi-layer polyester preform and container, particularly suitable for refillable PET carbonated beverage bottles, having an interior layer of high copolymer polyester material which resists hazing in the preform injection stage, and at least one exterior layer of a polyester to achieve enhanced strain-induced crystallization in the exterior layer during blow molding. The container can withstand higher caustic wash temperatures and exhibits reduced flavor carryover from one product to another.

US Patent:

49501437, Aug 21, 1990

Filed:

Jan 3, 1989

Appl. No.:

7/292956

Inventors:

Suppayan M. Krishnakumar - Nashua NH
Wayne N. Collette - Merrimack NH
Steven L. Schmidt - Merrimack NH
Thomas E. Nahill - Amherest NH

Assignee:

Continental PET Technologies, Inc. - Norwalk CT

International Classification:

B29C 4502

US Classification:

425130

Abstract:

It has been found that when layered preforms are being injection molded utilizing at least two materials, it is possible to maintain the same horizontal and vertical pitch of adjacent cavities as is possible when each mold cavity is being filled with a single material. Most particularly, it has been found that when the percentage of the material to be injected into a mold cavity is relatively high, it is possible to utilize a single metering pot for four adjacent mold cavities. On the other hand, if one of the materials to be injected into a mold cavity constitutes a relatively low percentage of the volume of a mold cavity, it has been found that a small metering pot must be provided for each of the cavities of the four cavity mold. Most particularly, with this combination, it is possible to maintain the pitch of the single material mold and thereby maintain the small size of existing injection systems as opposed to an increase in the pitch of the mold cavities which would increase the size of the mold structure.

US Patent:

53321219, Jul 26, 1994

Filed:

Dec 22, 1992

Appl. No.:

7/994681

Inventors:

Steven L. Schmidt - Merrimack NH
Wayne N. Collette - Merrimack NH
Suppayan M. Krishnakumar - Nashua NH

Assignee:

Continental PET Technologies, Inc. - Florence KY

International Classification:

B65D 3514

US Classification:

222 95

Abstract:

A squeezable container for dispensing a product out the open end of the container, including a collapsible inner layer and a resilient outer layer. The container is an integral body formed by expansion from a multi-layer preform, and preferably consists of one or more layers of polyethylene terephthalate (PET) separated by an adjacent boundary layer, such as a barrier layer of ethylene vinyl alcohol (EVOH). A one-way check valve is provided at the outer layer to restrict the flow of air into a chamber which is formed between the inner and outer layers as the inner layer collapses, and preferably a second check valve is provided in the open dispensing end of the container to prevent air from being drawn into the container when the outer layer is released. The container is economical to manufacture, light in weight, easy to handle, can be made of recycled materials, and is "product efficient" in that substantially all of the product can be dispensed from the container during use.