Extrusion die for forming a multicomponent continuous film of thermoplastic polymer

Claim 2

Die means for extruding a multicolored film comprising: a confined extrusion surface forming constraining elongated lip means through which a sheet of multicolored polymer film is extruded under pressure; said lip means having an upstream edge and an extrusion edge; replaceable insert means connected to the said upstream edge of said lip means; a first longitudinal row of conduits within said insert means, the downstream side of said conduits forming a first set of orifices in communication with said upstream edge of said lip means; at least a second longitudinal row of conduits separate from and interspaced among said first longitudinal row of conduits, the downstream side of said conduits forming a second set of orifices in communication with said upstream edge of said lip means; a body member housing said replaceable insert means and forming a first chamber and at least a second chamber, said first chamber being in communication with the upstream side of said first longitudinal row of conduits, said first longitudinal row of conduits forming a means for flowing a first colored molten thermoplastic polymer from said first chamber through said first set of orifices to spaced-apart locations along said upstream edge of said lip means and said at least second chamber being in communication with the upstream side of said at least second longitudinal row of conduits, said at least second longitudinal row of conduits forming a means for flowing at least a second colored molten thermoplastic polymer from said at least second chamber through said second set of orifices to spaced-apart locations along said upstream edge of said lip means; means spacing said first set of orifices in relation to the interspaced said second set of orifices in a position to cause a stream of said first polymer to be placed in edge contact with a stream of said second polymer within said lip means; and means for supplying said first chamber and said at least second chamber with differently colored thermoplastic polymers at temperatures and pressures suitable for extrusion into and through said lip means.

Claim 3

The die for extruding multicolored film from thermoplastic polymers according to claim 1 wherein said replaceable insert means may be removed from said body member and replaced with an insert means having a different configuration of conduits to thereby produce a multicolored film of a different pattern.

Claim 4

Die means for extruding a continuous sheet of film formed from stripes of thermoplastic polymer stock comprising: elongated lip means through which a sheet of polymer film is extruded under pressure; said lip means having an upstream edge and an extrusion edge with said upstream edge spaced laterally apart from said extrusion edge; an extrusion surface within said lip means and positioned between the laterally spaced apart said upstream edge and said extrusion edge; replaceable insert means connected to the said upstream edge of said lip means; a first longitudinal row of conduits within said insert means, the downstream side of said conduits forming a first set of orifices in communication with said upstream edge of said lip means; at least a second longitudinal row of conduits within said insert means separate from and interspaced among said first longitudinal row of conduits, the downstream side of said conduits of said second row forming a second set of said orifices in communication with said upstream edge of said lip means; a body member housing said insert means and forming a first chamber and at least a second chamber, said first chamber being in communication with the upstream side of said first longitudinal row of conduits, said first longitudinal row of conduits forming a means for flowing a first molten thermoplastic polymer from said first chamber through said first set of orifices to spaced-apart locations along said extrusion surface of said lip means, said at least second chamber being in communication with the upstream side of said at least second longitudinal row of conduits, said at least second longitudinal row of conduits forming a means for flowing at least a second molten thermoplastic polymer from said at least second chamber through said second set of orifices to spaced-apart locations along said extrusion surface of said lip Means; means spacing said first set of orifices in relation to the interspaced said second set of said orifices to cause a stream of said first polymer being extruded along said extrusion surface to be placed in edge contact with an adjacent stream of said second polymer being extruded along said extrusion surface; and means for supplying said first chamber and said at least second chamber with different thermoplastic polymers at temperatures and pressures suitable for extrusion into and through said lip means.

Claim 5

Die means for extruding a continuous sheet of film formed from stripes of thermoplastic polymer stock comprising: elongated lip means through which a sheet of polymer film is extruded under pressure; said lip means having an upstream edge and an extrusion edge with said upstream edge spaced laterally apart from said extrusion edge; an extrusion surface within said lip means and positioned between the laterally spaced apart said upstream edge and said extrusion edge; replaceable insert means connected to the said upstream edge of said lip means; a first longitudinal row of conduits within said insert means, the downstream side of said conduits forming a first set of orifices in communication with said upstream edge of said lip means; at least a second longitudinal row of conduits within said insert means separate from and interspaced among said first longitudinal row of conduits, the downstream side of said conduits of said second row forming a second set of said orifices in communication with said upstream edge of said lip means; a body member housing said insert means and forming a first chamber and at least a second chamber, said first chamber being in communication with the upstream side of said first longitudinal row of conduits, said first longitudinal row of conduits forming a means for flowing a first molten thermoplastic polymer from said first chamber through said first set of orifices to spaced-apart locations along said extrusion surface of said lip means, said at least second chamber being in communication with the upstream side of said at least second longitudinal row of conduits, said at least second longitudinal row of conduits forming a means for flowing at least a second molten thermoplastic polymer from said at least second chamber through said second set of orifices to spaced-apart locations along said extrusion surface of said lip Means; means spacing said first set of orifices in relation to the interspaced said second set of said orifices to cause a stream of said first polymer being extruded along said extrusion surface to be placed in edge contact with an adjacent stream of said second polymer being extruded along said extrusion surface; and means for supplying said first chamber and said at least second chamber with different thermoplastic polymers at temperatures and pressures suitable for extrusion into and through said lip means.

Claim 6

Die means for extruding a continuous sheet of film formed from stripes of different thermoplastic polymer stock bonded together edge to edge comprising: elongated lip means through which a sheet of thermoplastic polymer film is extruded under pressure, an extrusion edge on said lip means, spaced-apart opposing members forming said extrusion edge, means for adjusting the spacing of said spaced-apart members to control the thickness of said sheet of film extruded from said lip means, insert means connected to said lip means, a first longitudinal row of conduits within said insert means with said conduits forming a first set of orifices in communication with said lip means, a second longitudinal row of conduits separate from and interspaced among said forst longitudinal row of conduits with said second conduits forming a second set of orifices in communication with said lip means, a body member housing said insert means and forming a first chamber and a second chamber, said first chamber being in communication with said first longitudinal row of conduits, said first longitudinal row of conduits forming a means for flowing a first molten thermoplastic polymer from said first chamber through said first set of orifices to first spaced-apart locations along said lip means, said second chamber being in communication with said second longitudinal row of conduits, said second longitudinal row of conduits forming a means for flowing a second molten thermoplastic polymer from said second chamber through said second set of orifices to second spaced-apart locations adjacent to said first spaced-apart locations along said lip means, means for supplying said first chamber and said second chamber with different thermoplastic polymers at temperatures and pressures suitable for extrusion, and means for controlling the pressure on said thermoplastic polymer within said lip means.

Claim 7

Die means for extruding a continuous sheet of film formed from stripes of different thermoplastic polymer stock bonded together edge to edge comprising: elongated lip means through which a sheet of thermoplastic polymer film is extruded under pressure, an extrusion edge on said lip means, spaced-apart opposing members forming said extrusion edge, means for adjusting the spacing of said spaced-apart members to control the thickness of said sheet of film extruded from said lip means, insert means connected to said lip means, a first longitudinal row of conduits within said insert means with said conduits forming a first set of orifices in communication with said lip means, a second longitudinal row of conduits separate from and interspaced among said forst longitudinal row of conduits with said second conduits forming a second set of orifices in communication with said lip means, a body member housing said insert means and forming a first chamber and a second chamber, said first chamber being in communication with said first longitudinal row of conduits, said first longitudinal row of conduits forming a means for flowing a first molten thermoplastic polymer from said first chamber through said first set of orifices to first spaced-apart locations along said lip means, said second chamber being in communication with said second longitudinal row of conduits, said second longitudinal row of conduits forming a means for flowing a second molten thermoplastic polymer from said second chamber through said second set of orifices to second spaced-apart locations adjacent to said first spaced-apart locations along said lip means, means for supplying said first chamber and said second chamber with different thermoplastic polymers at temperatures and pressures suitable for extrusion, and means for controlling the pressure on said thermoplastic polymer within said lip means.

Claim 8

Die means for extruding a continuous sheet of film formed of alternating stripes of different thermoplastic polymers comprising: lip means through which said sheet is extruded under pressure, a first row of conduits in communication with said lip means with each of the conduits of said first row communicating with said lip means at first spaced-apart locations within said lip means, a second row of conduits, said second row of conduits communicating with said lip means at second spaced-apart locations within said lip means separate from and interspaced among and adjacent to said locations of said first row of conduits, a first chamber in communication with said first row of conduits, said first row of conduits forming passage means for flowing a first molten thermoplastic polymer from said first chamber to said first spaced-apart locations within and along said lip means, a second chamber in communication with said second row of conduits, said second row of conduits forming passage means for flowing a second molten thermoplastic polymer from said second chamber to said second spaced-apart locations within and along said lip means, means spacing said locations of said first row of conduits in relation to the interspaced said locations of said second row of conduits to cause a stream of the extruding said first molten thermoplastic polymer to be placed in adhering edge contact with a stream of the extruding said second molten thermoplastic polymer within said lip means while said polymers are being extruded therethrough. means for supplying said first chamber and said second chamber with respective different thermoplastic polymers at respective temperatures and respective pressures suitable for extrusion thereof, and means for adjusting the pressure of the extruding polymers within said lip means.

Claim 9

Die means for extruding a continuous sheet of film formed of alternating stripes of different thermoplastic polymers comprising: lip means through which said sheet is extruded under pressure, a first row of conduits in communication with said lip means with each of the conduits of said first row communicating with said lip means at first spaced-apart locations within said lip means, a second row of conduits, said second row of conduits communicating with said lip means at second spaced-apart locations within said lip means separate from and interspaced among and adjacent to said locations of said first row of conduits, a first chamber in communication with said first row of conduits, said first row of conduits forming passage means for flowing a first molten thermoplastic polymer from said first chamber to said first spaced-apart locations within and along said lip means, a second chamber in communication with said second row of conduits, said second row of conduits forming passage means for flowing a second molten thermoplastic polymer from said second chamber to said second spaced-apart locations within and along said lip means, means spacing said locations of said first row of conduits in relation to the interspaced said locations of said second row of conduits to cause a stream of the extruding said first molten thermoplastic polymer to be placed in adhering edge contact with a stream of the extruding said second molten thermoplastic polymer within said lip means while said polymers are being extruded therethrough. means for supplying said first chamber and said second chamber with respective different thermoplastic polymers at respective temperatures and respective pressures suitable for extrusion thereof, and means for adjusting the pressure of the extruding polymers within said lip means.