# US 7,461,526 B2 · Spiral system reactor for the treatment of hides and skins

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- Number: US 7,461,526 B2
- Document ID: US7461526B2
- Status: Granted
- Kind: B2
- Application number: 10/855,475
- Filed: 2004-05-27
- Published: 2005-02-17
- Granted: 2008-12-09
- Earliest claimed: 2003-08-11
- Inventors: Luis Cesio Caccialli
- Web page: https://patentgrep.com/patent/US7461526B2

## CPC

- C14C 15/00: Apparatus for chemical treatment or washing of hides, skins, or leather
- C14C: CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING (bleaching of leather or furs D06L; dyeing of leather or furs D06P)

## Abstract

A device used for the process of tanning hides and skins is disclosed. The device comprises a cylindrical body including crosspieces of appropriate shape and in appropriate arrangement inside it. The particular features of shape and operation of said device result in an increased load of hides and skins in each operation cycle, a decrease in the requirements of chemicals applied in proportion to the load being processed, a considerable decrease in processing time, and lower water requirements.

## Claims

### Claim 1

A spiral system reactor for the treatment of hides and skins, said reactor having a cylindrically shaped body defining a diameter and a longitudinal axis, said body rotating about the longitudinal axis and wherein said body encloses physically nonintersecting crosspieces of diametrical length spaced along at least one axis and intersecting said at least one axis at different angles to provide a plurality of mechanical members for at least one of scraping, tanning, retanning, dressing and beating activities on hides and skins as the body is rotated.

### Claim 2 (depends on 1)

The spiral system reactor for the treatment of hides and skins described in claim 1, wherein the physically nonintersecting crosspieces include at least one of baffles, paddles or pins projecting therefrom.

### Claim 3 (depends on 1)

The spiral system reactor for the treatment of hides and skins described in claim 1, wherein the axis is a longitudinal axis of rotation for the cylindrically shaped body.

### Claim 4 (depends on 1)

The spiral system reactor for the for the treatment of hides and skins described in claim 1, wherein the reactor is provided with gates for loading and unloading hides and skins relative to an interior of the reactor.

### Claim 5

A spiral system reactor for treatment of hides and skins, comprising:
a cylindrically shaped body rotatable about a longitudinal axis including a pair of end walls connected by an interior surface defining an interior of the body; and
a plurality of physically nonintersecting crosspieces within the interior of the body, each physically nonintersecting crosspiece including opposing ends having a base;
wherein the bases of the plurality of physically nonintersecting crosspieces are affixed to at least one of the interior surface and the pair of end walls; and
wherein the plurality of physically nonintersecting crosspieces are spaced apart from the interior surface and the pair of end walls.

### Claim 6 (depends on 5)

The spiral system reactor for treatment of hides and skins of claim 5, wherein the plurality of physically nonintersecting crosspieces extend through the longitudinal axis.

### Claim 7 (depends on 5)

The spiral system reactor for treatment of hides and skins of claim 5, wherein the plurality of physically nonintersecting crosspieces extend essentially perpendicular to the longitudinal axis.

### Claim 8 (depends on 5)

The spiral system reactor for treatment of hides and skins of claim 5, wherein the plurality of physically nonintersecting crosspieces include at least one of a baffle, paddle, and pin.

### Claim 9 (depends on 5)

The spiral system reactor for treatment of hides and skins of claim 5, wherein the bases are affixed to the interior surface.

### Claim 10 (depends on 5)

The spiral system reactor for treatment of hides and skins of claim 5, wherein the bases are affixed to the pair of end walls.