초록 ▼

A biased seal for a form, fill and seal packaging machine includes an elongated seal bar which is attached to a support element via a plurality of connectors/retainers which are fixed to the seal bear, but movable with respect to the support element. A plurality of compression springs are positioned

A biased seal for a form, fill and seal packaging machine includes an elongated seal bar which is attached to a support element via a plurality of connectors/retainers which are fixed to the seal bear, but movable with respect to the support element. A plurality of compression springs are positioned between the seal bar and the support element. The seal bar is movable on the connectors from a position wherein the seal bar is juxtapositioned against the sealing element and the compression springs are under compression and an extended position wherein the seal bar is displaced outward from the sealing elements by the bias in the compression springs. The support element is fixed to a slide assembly which is connected to an activator rod via an adjustment bracket. When used in combination with an opposing seal bar, the combination of the adjustable bracket assembly and the biased seal bar allows for variable amounts of pressure to be applied to films which are sealed together between the bias seal bar and the further seal bar.

대표청구항 ▼

In combination with a form, fill and seal packaging machine of the type having a housing with left and right cross seals guide rods fixedly mounted on said housing, an improvement comprising: an elongated seal bar; a slide assembly operatively mounted on said left and right guide rods to reciprocall

In combination with a form, fill and seal packaging machine of the type having a housing with left and right cross seals guide rods fixedly mounted on said housing, an improvement comprising: an elongated seal bar; a slide assembly operatively mounted on said left and right guide rods to reciprocally slide on said guide rods; activator means for sliding said slide assembly on said guide rods; adjustment means for variably positioning said slide assembly with respect to said activator means axially in a direction parallel with the axes of said guide rods; said adjustment means operatively interspaced between said slide assembly and said activator means whereby motion is transferred from said activator means to said slide assembly through said adjustment means; a plurality of connecting means for movably attaching said seal bar to said slide assembly; and biasing means for biasing said seal bar from a position wherein said seal bar is juxtapositional with said slide assembly towards a distal position wherein said seal bar is spaced from said slide assembly.