04534818 is referenced by 53 patents and cites 5 patents.

An automatic form-and-fill packaging machine especially adapted for the ultrasonic sealing of food products in flexible bags from ultrasonically sealable flexible packaging material, and a method to utilize said machine. A packaging machine is provided with a first ultrasonic back seal forming unit for producing a continuous longitudinal back seal on the bag, and a second ultrasonic sealing unit provided in a pair of jaw members which are adapted to form the end seals of the bag perpendicular to the direction of travel of the packaging material. The second ultrasonic sealing unit is provided with a horn and an anvil in opposing jaw members, such that when the jaws are shut, the flexible packaging material is tensioned against sealing land areas to provide the end seals.

Title
Method and apparatus for ultrasonic sealing
Application Number
6/564754
Publication Number
4534818
Application Date
December 22, 1983
Publication Date
August 13, 1985
Inventor
Kenneth R Berger
Grapevine
TX, US
William D Kreager
Dallas
TX, US
Agent
Bernard Rothwell & Brown
Assignee
Frito Lay
TX, US
IPC
B29D 23/10
B29C 27/08
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