Annex A.2 - WIPO search request

Also in this Chapter:

• Annex A.1 - WIPO search request guidelines​​​​​​​
• Annex A.3 - WIPO search request​​​​​​​​​​​​​​

APPENDIX 1

Model No.1

SEARCH REQUEST

Title: Knives for cutting and Preparing Sugar Cane for its After-Processing

Description:

Our grinding mills for initial preparation comprise knives for cutting sugar cane, consisting of a cylindrical hollow shaft of large diameter with a series of discs, acting as knife holders, fixed to the shaft by appropriate means, and a series of knives fixed to wide discs. Furthermore, there are defibrator knives with one or two curved edges coated with hard welding. At present, special attention is directed to equipment for initial preparation in order to eliminate design defects and frequent breakages, as well as bottlenecks, appearing in the crushing and cutting of cane, and to find out the optimal parameters for the exploitation or operation of the knives.

In general, special attention has been given to trends for the application of:

Special shredding of defibration knives (serrated tooth)

Double-edge revolving cane knives

Swinging hammers

Dollies

Reversing mechanisms

The introduction of heavy and light hammers, as well as heavy defibrators, is also being investigated.

Summary:

In order to improve the initial preparation and to avoid any insufficiencies (such as breaking of the shaft or knife support, or defibration elements, wear of the knife material. etc.) occurring in the crushing and cutting of cane, investigations for applying the above-mentioned equipment are being made.

Request:

Patent documents and possibly other relevant literature -especially of recent date- concerning equipment for crushing or cutting the fibers of sugar cane, as well as progressive methods for initial preparation, are requested.

SEARCH REPORT

a. Field of Search (IPC): C 13 B

b. Pertinent Literature:

c. Comments:

The listed patent documents DE-AS 1 191 310 to US 1 217 326 relate to devices for cutting sugar cane. The patent documents DE-AS 1 016 200 to DE 360 561 deal with sugar cane crushers. The documents DE-OS 1 532 298 to GB 1 138 081 describe examples of various devices for disintegrating sugar cane. US patents Nos. 3 567 510 and 3 424 612 describe methods and apparatus for separating the components of sugar cane stalks. The remaining patent documents describe devices for preparing sugar cane with the aim of removing the sugar by diffusion.

The above-mentioned patent documents do not necessarily give information about the advantages and disadvantages (such as wear of knife material, etc.) of the devices so described. In view of the request for information disclosing more progressive methods than those mentioned in the application, old patent specifications have not been cited.