US4194947A — Transferring a web from a pick-up fabric to a flo…

Claim 1

Independent Claim 194 words

A method in a paper making machine for transferring a web from a pick-up fabric to a flow-through drying wire and for transporting the web supported by said drying wire over a flow-through dryer cylinder,said drying wire engaging said drying cylinder, comprising the steps of: passing a section of said flow-through drying wire over the web supported by the pick-up fabric defining a sandwich structure of the drying wire, the web and the pick-up fabric; applying a first vacuum from a first vacuum member on said sandwich structure from the flow-through drying wire side thereof over a narrow first detaching zone; deviating the direction of the pick-up fabric with respect to the flow-through wire; applying a second vacuum from a second vacuum member over a second holding zone substantially immediately subsequent to said first detaching zone in the direction of web travel from the flow through drying wire side thereof,said first and second vacuums being supplied from the same source, and further including the step of providing means for fluidly communicating said first and second vacuum members and adjusting the relative magnitudes of the first and second vacuums by adjusting said fluid communication means.

Claim 2

Independent Claim 194 words

A method in a paper making machine for transferring a web from a pick-up fabric to a flow-through drying wire and for transporting the web supported by said drying wire over a flow-through dryer cylinder,said drying wire engaging said drying cylinder, comprising the steps of: passing a section of said flow-through drying wire over the web supported by the pick-up fabric defining a sandwich structure of the drying wire, the web and the pick-up fabric; applying a first vacuum from a first vacuum member on said sandwich structure from the flow-through drying wire side thereof over a narrow first detaching zone; deviating the direction of the pick-up fabric with respect to the flow-through wire; applying a second vacuum from a second vacuum member over a second holding zone substantially immediately subsequent to said first detaching zone in the direction of web travel from the flow through drying wire side thereof,said first and second vacuums being supplied from the same source, and further including the step of providing means for fluidly communicating said first and second vacuum members and adjusting the relative magnitudes of the first and second vacuums by adjusting said fluid communication means.

Claim 3

Dependent Claim 31 words

The method as recited in claim 1 further including the step of adjusting the magnitude of the vacuums such that said first vacuum has a higher magnitude than said second vacuum.

Claim 4

Dependent Claim 51 words

The method as recited in claim 1 wherein said flow-through drying wire engages said drying cylinder, further including the step of providing that said second holding zone extends on said flow-through drying wire from said first detaching zone to the point of engagement of said drying cylinder with said drying wire.

Claim 5

Dependent Claim 35 words

The method as recited in claim 1 wherein the interior of the flow-through cylinder is provided with a vacuum producing means, further including the step of supplying said second vacuum from said dryer cylinder interior.

Claim 6

Dependent Claim 31 words

The method as recited in claim 1 wherein the pick-up fabric is felt further including the step of removing water from the web through said felt without any wet pressing thereof.

Claim 7

Dependent Claim 13 words

The method as recited in claim 1 wherein the pick-up fabric is wire.

Claim 8

Dependent Claim 176 words

Apparatus in a paper making machine for transferring a web from a pick-up fabric to a flow-through drying wire comprising: a pick-up fabric for transporting a web; a lead-in roller engaging said pick-up fabric; a flow-through drying cylinder; a flow-through drying wire having a draw defined between a section adapted to overlap the web supporting pick-up fabric on said lead-in roller and a section engaged on the flow-through drying cylinder; means located adjacent said draw of said flow-through drying wire in the proximity of said lead-in roller for applying a first vacuum over a narrow first detaching zone of said flow-through wire draw; and means located subsequent to said first vacuum applying means in the direction of web travel adjacent to said draw of said flow-through drying wire for applying a second vacuum over a second holding zone of said flow-through wire draw,said second vacuum applying means comprising a vacuum chamber having an air pervious guide surface located contiguous with said flow-through drying wire draw, said air pervious guide surface including a perforated stationary plate member.

Claim 9

Dependent Claim 176 words

Apparatus in a paper making machine for transferring a web from a pick-up fabric to a flow-through drying wire comprising: a pick-up fabric for transporting a web; a lead-in roller engaging said pick-up fabric; a flow-through drying cylinder; a flow-through drying wire having a draw defined between a section adapted to overlap the web supporting pick-up fabric on said lead-in roller and a section engaged on the flow-through drying cylinder; means located adjacent said draw of said flow-through drying wire in the proximity of said lead-in roller for applying a first vacuum over a narrow first detaching zone of said flow-through wire draw; and means located subsequent to said first vacuum applying means in the direction of web travel adjacent to said draw of said flow-through drying wire for applying a second vacuum over a second holding zone of said flow-through wire draw,said second vacuum applying means comprising a vacuum chamber having an air pervious guide surface located contiguous with said flow-through drying wire draw, said air pervious guide surface including a perforated stationary plate member.

Claim 10

Dependent Claim 23 words

Apparatus as recited in claim 7 further including means for deviating the direction of the pick-up fabric with respect to the flow-through wire.

Claim 11

Dependent Claim 39 words

Apparatus as recited in claim 7 wherein said second holding zone extends over said draw of said flow-through wire from said first detaching zone to substantially the point of engagement of said flow-through wire with said flow-through drying cylinder.

Claim 12

Dependent Claim 30 words

Apparatus as recited in claim 7 further including at least two vacuum producing means and wherein said first and second vacuum applying means are connected to different vacuum producing means.

Claim 13

Dependent Claim 29 words

Apparatus as recited in claim 10 wherein the vacuum producing means to which said second vacuum applying means is connected comprises the vacuumed interior of said flow-through drying cylinder.

Claim 14

Dependent Claim 28 words

Apparatus as recited in claim 7 wherein the pick-up fabric comprises felt adapted to remove water from the web in the absence of wet pressing of the web.

Claim 15

Dependent Claim 12 words

Apparatus as recited in claim 7 wherein said pick-up fabric comprises wire.

Claim 16

Dependent Claim 187 words

Apparatus in a paper making machine for transferring a web from a pick-up fabric to a flow-through drying wire comprising: a pick-up fabric for transporting a web; a lead-in roller engaging said pick-up fabric; a flow-through drying cylinder; a flow-through drying wire having a draw defined between a section adapted to overlap the web supporting pick-up fabric on said lead-in roller and a section engaged on the flow-through drying cylinder; means located adjacent said draw of said flow-through drying wire in the proximity of said lead-in roller for applying a first vacuum over a narrow first detaching zone of said flow-through wire draw, said first vacuum applying means comprising a vacuum strip including a vacuum strip member having a vacuum transmitting slot formed therein; and means located subsequent to said first vacuum applying means in the direction of web travel adjacent to said draw of said flow-through drying wire for applying a second vacuum over a second holding zone of said flow-through wire draw, said second vacuum applying means comprising a vacuum chamber having an air pervious guide surface located contiguous with said flow-through drying wire draw.

Claim 17

Dependent Claim 187 words

Apparatus in a paper making machine for transferring a web from a pick-up fabric to a flow-through drying wire comprising: a pick-up fabric for transporting a web; a lead-in roller engaging said pick-up fabric; a flow-through drying cylinder; a flow-through drying wire having a draw defined between a section adapted to overlap the web supporting pick-up fabric on said lead-in roller and a section engaged on the flow-through drying cylinder; means located adjacent said draw of said flow-through drying wire in the proximity of said lead-in roller for applying a first vacuum over a narrow first detaching zone of said flow-through wire draw, said first vacuum applying means comprising a vacuum strip including a vacuum strip member having a vacuum transmitting slot formed therein; and means located subsequent to said first vacuum applying means in the direction of web travel adjacent to said draw of said flow-through drying wire for applying a second vacuum over a second holding zone of said flow-through wire draw, said second vacuum applying means comprising a vacuum chamber having an air pervious guide surface located contiguous with said flow-through drying wire draw.

Claim 18

Dependent Claim 29 words

Apparatus as recited in claim 14 further including a vacuum producing means and wherein said first and second vacuum applying means are both connected to said vacuum producing means.

Claim 19

Dependent Claim 38 words

Apparatus as recited in claim 15 further including means for providing a selectively variable fluid communication between said vacuum chamber and said vacuum strip member whereby the relative values of said first and second vacuums may be varied.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1983-03-25	1983-09-24	1984-03-25	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1987-03-25	1987-09-24	1988-03-25	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1991-03-25	1991-09-24	1992-03-25	$7700.00	Window Closed / Lapsed

Transferring a web from a pick-up fabric to a flow-through drying wire

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