A package is provided with a lid and container that are heat sealed together. A multi-ply sheet material is provided for being thermoformed to define the container which has a tapering wall and bulge-resistant bottom end. Prior to thermoforming the container from the sheet, the sheet is heated with oval pads on a plurality of plates which are arranged in a configuration to facilitate control of the sheet temperature. A plug is used in the thermoforming process to contact the sheet and position the sheet within a die. A lid sheet is heat sealed to the container sheet over the thermoformed containers so as to produce a pair of spaced-apart, annular bead heat seals. The package is completed by severing the sealed-together sheets at the periphery of the container with a punch and die set that produces a clean, smooth cut surface.
申请公布号
WO9839219(A3)
申请公布日期
1998.11.26
申请号
WO1998US04032
申请日期
1998.03.03
申请人
ABBOTT LABORATORIES
发明人
MIHALOV, LORI, J.;SITA, LEWIS, H.;STEVENS, TODD, A.;ULSTAD, DAVID, C.;ZEITLER, W., GEORGE