Extended nip press for the leather industry

A wide nip, press technology used in presses, manufacturing tools, leather flattening/rolling, etc.

Inactive Publication Date: 2005-11-09
ALBANY INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device provides a solution to the problem of efficient water removal from leather raw hides during the flushing process

Method used

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  • Extended nip press for the leather industry
  • Extended nip press for the leather industry
  • Extended nip press for the leather industry

Examples

Experimental program
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Embodiment Construction

[0025] A preferred embodiment of the present invention is a wide nip press capable of efficiently removing water from hides during the squeezing / wetting operation. In the early 1980s, the concept of a wide-nip press, or shoe press, emerged in the paper industry. The shoe press replaces the traditional concept of opposing twin rolls. In place of one of the rollers, a curved steel shoe is placed to substantially match the radius of the opposite roller. An endless belt coated with elastic compound spans the surface of the boot. A thin film of oil lubricates the shoe / belt interface. This concept is generally referred to as "fluid dynamic bearing". The force exerted on the steel shoe by the hydraulic system creates a pressure between the steel shoe and the roller. The opposing rollers are in fixed positions.

[0026] In the paper industry, paper is formed by depositing a fiber-containing slurry onto a moving forming fabric. Supported by a press fabric, the paper passes throug...

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PUM

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Abstract

An extended nip press machine, similar to those used in the paper industry, for use in the leather industry to remove water from hides after the tanning process. The leather press consists of a shoe whose surface substantially matches the radius of an opposing pressure roll. Moving across the shoe is an endless belt, which is lubricated by a thin film of oil. Between the belt and corresponding pressure roll pass two endless felt belts, which are the means of conveying the leather hides. The nip formed by the shoe press is dramatically longer than a conventional press nip, thereby increasing the dewatering efficiency of the leather press.

Description

technical field [0001] The invention relates to leather tanning technology. More particularly, the present invention relates to a long-nip press for drying tanned leather hides. Background technique [0002] Leather tanning is the process of converting raw hides or skins into leather. Raw and bare hides have the ability to absorb preservative tannins and other chemicals. figure 1 A general flowchart for the leather tanning and finishing process. Hides are embalmed, ie, once the raw hide has been removed from the animal body, it is subjected to a treatment process involving salting and / or drying. [0003] The first step, commonly referred to as the "beamhouse" operation 10 , prepares the raw hides for the tanning operation 20 . The hide is trimmed and soaked in water to remove salt and other solids and to restore water lost during embalming. The raw hide is then fleshed to remove excess tissue and create a uniform thickness. Hair is removed from raw hides by dipping the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14B1/34
CPCC14B1/34B30B9/20B30B9/241A45D40/24A45D34/04A45D40/262A45D40/20A45D44/005A45D2033/001A45D2034/002A45D2040/0006A45D2040/201
Inventor 埃里克·罗曼斯金
Owner ALBANY INT CORP
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