Sealing system for improved applicator die
AssigneeAvery Dennison
InventorsBert Potjer, Luigi Sartor, Robert Lindsay Druschel
Life of this patent
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Abstract
An improved applicator die for alternately depositing different liquid coating materials on a moving web comprises a die body having switch bars for opening and closing respective flow passageways for supplying the different liquid coating materials to an elongated coating orifice from respective manifolds. The switch bars, flow passageways and manifolds are substantially as wide as and substantially parallel to the coating orifice of the die whereby changeover between different coating materials can be made very rapidly.
Claims11
A die for alternately depositing multiple liquid materials on the surface of a moving web to form a uniform coating layer thereon, said die comprising
- a die body defining first and second inlet orifices, an elongated coating orifice, and first and second liquid passageways communicating between said coating orifice and said first and second inlet orifices, respectively, and
- closure means for alternately closing said first and second liquid passageways positioned across said first and second liquid passageways, said closure means comprising at least two closure elements having at least one slidable surface mounted for reciprocating linear, sliding motion at an angle to said first and second liquid passageways in said die body, said closure element including sealing means on at least one slidable surface thereof for preventing liquid materials from leaking out of said die.
A die for alternately depositing multiple liquid materials on the surface of a moving web to form a uniform coating layer thereon, said die comprising
- a die body defining first and second inlet orifices, an elongated coating orifice, and first and second liquid passageways communicating between said coating orifice and said first and second inlet orifices, respectively, and
- closure means for alternately closing said first and second passageways positioned across said first and second passageways, comprising a first closure elements for closing said first passageway and a second closure element for closing said second passageway, each of said closure elements being slidably movable in said die body and comprising:
- a switch bar arranged generally parallel to said elongated coating orifice, having a length substantially the same as the length of said elongated coating orifice and including sealing means comprising:
- at least one strip of flexible material traversing the length of said switch bar on at least one slidable surface thereof for preventing said first and second liquid materials from leaking out of said die.
Dependencies are inferred from the claim text.