Device and process for production of a fibrous web
OwnerDan Clarahan, Ron Gropp +2inventors
InventorsDan Clarahan, Ron Gropp, Frances Gropp, Paul Arnold
Life of this patent
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Abstract
A machine and process for production of a fibrous web, with a forming section (2) in which the web is formed from a pulp suspension on a fabric (3) and with a final drying unit (4). In at least one further drying step, a rotatable dryer (5) with a hood (6) is located after the forming section (2) and before the final drying unit (4). The additional dryer (5) has a gas-impermeable exterior surface (7) which is directly heated by a combustion unit such a gas or oil fired burner (9).
Claims25
Machine for production of a fibrous web, comprising:
- a forming section in which the web is formed from a pulp suspension on a fabric;
- a final drying unit;
- and at least one intermediate dryer located after the forming section and before the final drying unit;
- wherein the intermediate dryer has a rotating, gas-impermeable external drying surface contacting the web, which is overlaid with a fabric such that the web and fabric co-rotate with the drying surface;
- and a combustion unit that directly heats the drying surface.
Process for production of tissue, in which a fibrous web is formed from a pulp suspension on a fabric in a forming section and this web is then dried on a final drying unit, with an additional, intermediate drying step for the web being implemented before the web reaches the final drying unit, wherein the improvement comprises that the additional drying step is performed with the web carried on a moving, imperforate drying surface that is directly heated by a combustion unit.
Dependencies are inferred from the claim text.