Method of transferring a wet tissue web to a three-dimensional fabric
First Claim
1. A method of producing a tissue product comprising:
- depositing an aqueous suspension of papermaking fibers onto a forming fabric to form a wet web;
dewatering the wet web to a consistency of at least about 30%;
conveying the dewatered web onto a transfer surface;
heating the web on the transfer surface;
transferring the web from the transfer surface to a fabric while applying a suction force to the web; and
wherein the step of heating the web in addition to the suction force causing a gas to evolve from the water associated with the web, the gas facilitating separation of the web from the transfer surface for transfer onto the fabric.
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Accused Products
Abstract
A process for producing tissue webs is disclosed. In particular, the process is directed to transferring a wet web from a transfer surface to a separate conveyor, such as a fabric. The process, in one embodiment, may include the steps of partially dewatering a tissue web, subjecting the web to at least one deflection against a fabric, such as a coarse fabric, and then creping the web. During the process, after being dewatered, the tissue web is transferred from a transfer surface to the fabric while subjecting the wet tissue web to temperatures and pressures sufficient to cause gases to evolve from liquids associated with the web. The gases form in between the tissue web and the transfer surface facilitating transfer of the web onto the fabric. In one particular embodiment, for example, gases are evolved by heating the wet web and then subjecting the web to a suction force. The gases that are evolved from the liquid include gases that were dissolved in the liquid and may include vapors that are also formed during the process, such as water vapor.
53 Citations
34 Claims
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1. A method of producing a tissue product comprising:
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depositing an aqueous suspension of papermaking fibers onto a forming fabric to form a wet web;
dewatering the wet web to a consistency of at least about 30%;
conveying the dewatered web onto a transfer surface;
heating the web on the transfer surface;
transferring the web from the transfer surface to a fabric while applying a suction force to the web; and
wherein the step of heating the web in addition to the suction force causing a gas to evolve from the water associated with the web, the gas facilitating separation of the web from the transfer surface for transfer onto the fabric. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of producing a tissue product comprising:
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depositing an aqueous suspension of papermaking fibers onto a forming fabric to form a wet web, water associated with the web containing a dissolved gas;
conveying the wet web onto a transfer surface, the transfer surface being substantially water impermeable;
subjecting the web to temperatures and pressures sufficient to cause gases dissolved within the water to undissolve and evolve from the water;
transferring the web from the transfer surface to a fabric, the gases that have evolved from the water facilitating separation of the web from the transfer surface for transfer onto the fabric. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification