Yellow pine wood animal litter method of manufacture

• US 5,927,049 A
• Filed: 10/23/1997
• Issued: 07/27/1999
• Est. Priority Date: 10/23/1997
• Status: Expired due to Term

• Current Assignee: Church & Dwight Company Incorporated
• Original Assignee: Nature's Earth Products Incorporated
• Inventors: Simard, Kenyon Allen
• Primary Examiner(s): Moon, Daniel B.
• Application Number:
  US08/956,560
• Time in Patent Office: 642 Days
• Field of Search: 53/428, 53/435, 53/438, 53/440, 100/39, 100/96, 100/903, 100/904, 100/905, 100/906, 100/907, 100/908, 119/171, 119/172, 119/173, 241/23, 241/28
• US Class Current: 53/428
• CPC Class Codes: A01K 1/0155 comprising organic material
• CPC Class Codes: Y10S 100/903 Pelleters

Abstract

A method for processing yellow pine wood products into pellets for use as animal litter. The process includes the steps of collecting and drying yellow pine material and drying the wood material into a grist. The grist is moisturized by exposure to steam before placement into a pellet forming device that applies heat and pressure to the grist. The formed pellets are deposited into bags and sealed for shipment. The pellets are used as animal litter that is highly absorbent, biodegradable, odor controlling, dustless, and will remain smooth and non-fur-engaging through continued handling.

Claims

1. A method of making wood fiber pellets for animal litter, comprising the steps of:

(a) drying yellow pine wood material at temperature in the range between 120°

F. to 140°

F. for a time period of approximately two weeks;

(b) grinding said dried material by use of a hammer mill to form a grist;

(c) exposing said grist to steam having a temperature in the range between 120°

F. to 140°

F. for a time period of approximately thirty and forty seconds;

(d) forming said grist into smooth uniform shaped pellets by exposing said conditioned grist at a predetermined pressure of about 60 Kpsi at a temperature between 200°

F. to 250°

F. for approximately eight to ten seconds;

(e) cooling said pellets to an ambient temperature;

(f) dividing said pellets into a first group and a second group, said first group containing said pellets of preferred dimensions and said second group containing said pellets of non-preferred dimensions; and

(g) packaging said first group of said pellets for storage and distribution.

2. The method of making wood fiber pellets for animal litter of claim 1 including the step of:

(h) returning said second group of said pellets to step (c).