发明授权
- 专利标题: Process and apparatus for making foreshortened cellulsic structure
- 专利标题(中): 制造缩短的脉冲结构的方法和装置
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申请号: US994927申请日: 1997-12-19
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公开(公告)号: US6139686A公开(公告)日: 2000-10-31
- 发明人: Paul Dennis Trokhan , Mark Ryan Richards , Michael Gomer Stelljes, Jr.
- 申请人: Paul Dennis Trokhan , Mark Ryan Richards , Michael Gomer Stelljes, Jr.
- 申请人地址: OH Cincinnati
- 专利权人: The Procter & Gamble Company
- 当前专利权人: The Procter & Gamble Company
- 当前专利权人地址: OH Cincinnati
- 主分类号: D21F5/00
- IPC分类号: D21F5/00 ; D21F11/00 ; D21F11/14 ; D21H27/00
摘要:
A process and an apparatus for making a foreshortened paper web are disclosed. A wet web disposed on a fluid-permeable papermaking fabric is being pressed between two parallel and mutually opposed first and second press surfaces, the first press surface contacting the web, and the second press surface contacting the fabric. In the continuous process, the press surfaces, the web and the fabric move in a machine direction. Under pressure, at least selected portions of the web become densified and adhered to the first press surface which can be treated with a creping adhesive. The first surface is heated to create a temperature differential between two surfaces. The temperature differential causes the water contained in the web to move from the web into the fabric, thereby drying the web. After the web is released from the pressure, the web is foreshortened either by creping or by transferring the web to a slower moving transfer fabric. Creping is performed with a creping doctor blade juxtaposed with the creping surface having the web adhered thereto. A creping adhesive may be deposited on the creping surface according to a predetermined pattern. The creping surface may comprise the first press surface. Optionally, the web may be calendered after being foreshortened.
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