Extended nip press for the leather industry

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...

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

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