Par J Svensson

US Patent:

56050267, Feb 25, 1997

Filed:

Sep 28, 1994

Appl. No.:

8/315412

Inventors:

Erik Schott - Buffalo Grove IL
Hisami Mitsuishi - Wheeling IL
Par Svensson - Palatine IL
Stefan Annehed - Palatine IL
Dean Skonieczny - Palatine IL
Olof Stark - Ystad, SE
Gunnar Drevfors - Akarp, SE

Assignee:

Tetra Laval Holdings & Finance S.A. - Pully

International Classification:

B65B 720
B65B 5110

US Classification:

533737

Abstract:

Ultrasonic sealing apparatus, including at least one anvil and at least one transducer opposed to the anvil to transmit ultrasonic energy to a workpiece clamped between them, is disclosed. The anvil and sealing horn each are reciprocated between an open position allowing a carton to pass and a closed position for sealing a closure. A biasing element is connected between the anvil or the horn and its drive to define the sealing pressure developed between the anvil and the horn. The biasing force can be adjusted without stopping the machine, by using an externally applied pneumatic force. The anvil has a backing element, a facing member, a body, and a resilient pad separating the body from the facing member. The backing element has a curved front surface facing the transducer. The back surface of the anvil pad is curved similarly to and bears against the curved front surface of the backing element.

US Patent:

58652175, Feb 2, 1999

Filed:

Mar 6, 1997

Appl. No.:

8/812411

Inventors:

Peter Giacomelli - Buffalo Grove IL
Robert Muns - Gurnee IL
Anders Andren - Palatine IL
Par Svensson - Chicago IL

Assignee:

Tetra Laval Holdings&Finance, SA - Pully

International Classification:

B67C 326

US Classification:

141263

Abstract:

A filling system of a packaging machine is set forth that reduces the mixing of product and air during the filling of the container with a flowable material such as low fat milk. The fill pipe of the filling system has an elliptical cross-section which provides for a reduced velocity of the flowable material entering the container while allowing for an increased production time of the packaging machine. The fill system is especially adopted to fill containers having a rectangular cross-section. Connected to the fill pipe is a nozzle with flaps designed to substantially conform and engage with the sidewalls of a container. When the flaps are urged to an open position, the mixing of air and product is inhibited as the flowable material is dispensed into the container through the nozzle and as a moving mechanism is operated to relatively move the container and nozzle from a first to a second position. The fill pipe has an elongate body, an inlet end and an outlet end. The inlet end is in flow communication with the fill pump and may have a circular cross-section.

US Patent:

55758843, Nov 19, 1996

Filed:

Sep 28, 1994

Appl. No.:

8/315398

Inventors:

Stefan Annehed - Palatine IL
Hisami Mitsuishi - Wheeling IL
Erik Schott - Buffalo Grove IL
Dean C. Skonieczny - Palatine IL
Par J. Svensson - Palatine IL

Assignee:

Tetra Laval Holdings & Finance S.A. - Pully

International Classification:

B32B 3116

US Classification:

1565801

Abstract:

An ultrasonic transducer assembly for hygienic ultrasonic sealing is disclosed. The assembly includes a hygienic ultrasonic sealing area and a non-hygienic area, separated by a barrier wall. The barrier wall has an opening which allows an ultrasonic converter to move back and forth ("reciprocate") through the opening. The ultrasonic converter is also vibrated at an ultrasonic frequency by machinery located in the non-hygienic area of the machine, and transmits those vibrations to the hygienic area of the machine. The converter has a null area at which the converter is vibrated substantially minimally and other areas which are much more vigorously vibrated. A generally cylindrical sealing surface is fixed with respect to the null area of the transducer. The sealing surface is wiped by a wiping seal mounted to the edge of the opening. These two parts may also be reversed.