# US 5,349,150 A · Method of manufacture of a profiled segment

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- Number: US 5,349,150 A
- Document ID: US5349150A
- Status: Granted
- Kind: A
- Application number: 08/100,614
- Filed: 1993-07-30
- Granted: 1994-09-20
- Earliest claimed: 1991-07-29
- Assignees: Maschinenbau Herbert GmbH & Co.
- Inventors: Norbert Jachowsky
- Web page: https://patentgrep.com/patent/US5349150A

## CPC

- B29C 33/10: with incorporated venting means
- B29D 30/0606: {Vulcanising moulds not integral with vulcanising presses (for solid tyres B29D30/02)}
- B29D 2030/0617: {Venting devices, e.g. vent plugs or inserts}
- B29L 2030/00: Pneumatic or solid tyres or parts thereof {(conveyor belts B29L2031/7092; drive belts B29L2031/7094; fourdrinier belts B29L2031/733)}
- Y10S 425/812: Venting
- Y10T 29/49796: Coacting pieces
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

In order to assure a safe gas discharge from the cavity formed in the tire-vulcanizing mold during the forming of the tire blanks, the profiled segment (1) be divided along at least one separating line (2) into at least two partial segments (3 to 8), that the separating line (2) extends substantially radially in relationship to the tire mold, and that the separating line (2) cuts the areas of the tire-vulcanizing mold to be vented. Manufacture of the segments is done such that the profiled segment (1) is first manufactured in one piece and is thereafter divided into the partial segments by means of a cutting operation, such as a wire cutting spark-erosion cutting operation, leaving behind a narrow cutting line (FIG. 1).

## Claims

### Claim 1

A method for the manufacture of a profiled segment which forms a part of a tire-vulcanization mold, comprising the steps of constructing a one piece, annular, profiled segment having a tread pattern formed on a radially inner surface thereof; and, thereafter, dividing the one piece, annular, profiled segment along at least one separating interface having conforming irregular and nonplanar opposing surface patterns extending generally parallel to a plane of rotation of the tire vulcanization mold into at least two partial profiled segments so that said partial profiled segments will fit together only when said irregular and nonplanar surface patterns directly oppose one another.

### Claim 2 (depends on 1)

The method according to claim 1, wherein said dividing step includes selectively choosing said irregular and nonplanar surface patterns so that a location of said separating interface intersects areas of the tread pattern requiring ventilation when said partial profiled segments form a part of the tire-vulcanization mold.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the dividing is done by means of a spark-erosion cutting operation.