Product and method for production of articles having compound curves

• US 3,042,562 A
• Filed: 05/04/1959
• Issued: 07/03/1962
• Est. Priority Date: 05/04/1959
• Status: Expired due to Term

• Current Assignee: Norman R. Peterson
• Original Assignee: Norman R. Peterson
• Inventors: Peterson, Norman R.
• Application Number:
  US03/810,935
• Time in Patent Office: 1,156 Days
• US Class Current: 428/98
• CPC Class Codes: B29C 44/12 Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
• CPC Class Codes: B29K 2105/06 containing reinforcements, fillers or inserts
• CPC Class Codes: E04C 2/405 composed of two or more hingedly connected parts
• CPC Class Codes: Y10T 156/1064 Partial cutting [e.g., grooving or incising]
• CPC Class Codes: Y10T 428/24 Structurally defined web or sheet [e.g., overall dimension, etc.]
• CPC Class Codes: Y10T 428/24471 Crackled, crazed or slit
• CPC Class Codes: Y10T 428/2457 Parallel ribs and/or grooves
• CPC Class Codes: Y10T 428/24628 Nonplanar uniform thickness material
• CPC Class Codes: Y10T 428/24669 Aligned or parallel nonplanarities
• CPC Class Codes: Y10T 428/249992 Linear or thermoplastic

Claims

1. A SUBSTANTIALLY HOMALOIDAL SHEET OF SUFFICIENT THICKNESS TO BE RIGID AND HAVING AT LEAST TWO GENERALLY OPPOSITE SURFACES;

A PLURALITY OF SLITS EXTENDING INTO SAID SHEET TO A DEPTH GREATER THAN ONE-HALF THE THICKNESS OF SAID SHEET;

THE SLITS THE ORIGINATE FROM ANY ONE SURFACE DEFINING A PLURALITY OF ADJACENT COLUMNS, AND THE SLITS FROM OPPOSITE SURFACES BEING ONTERGIDITATED WITH ONE ANOTHER;

SAID SHEET HAVING FORMED THEREIN AT LEAST ONE COMPOUND CURVE, AND AT LEAST THE SLITS FORMED IN SAID CURVE BEING FILLED WITH A HARDENABLE MATERIAL.