Suction device for an automatic cutting machine and a cutting method implementing said device

• US 5,626,066 A
• Filed: 03/01/1995
• Issued: 05/06/1997
• Est. Priority Date: 09/01/1992
• Status: Expired due to Fees

• Current Assignee: Lectra SA
• Original Assignee: Lectra Systemes
• Inventors: Lallement, Regis
• Primary Examiner(s): Peterson, Kenneth E.
• Application Number:
  US08/392,894
• Time in Patent Office: 797 Days
• Field of Search: 83/451, 83/100, 83/24, 269/21, 137/602, 137/605, 15/413, 15/412
• US Class Current: 83/451
• CPC Class Codes: B08B 15/00 Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area parts, details or accessories of cooking-vessels for withdrawing or condensing cooking vapours from such vessels A47J36/38; refuse disposal B65F; devices for conducting smoke or fumes, e.g. flues, F23J11/00; removing cooking fumes from domestic stoves or ranges F24C15/20; air conditioning, ventilation F24F
• CPC Class Codes: B08B 2215/006 Suction tables
• CPC Class Codes: B26D 7/018 Holding the work by suction
• CPC Class Codes: B26F 1/00 Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor subbjecting the grinding tools or the abrading medium to vibration, e.g. grinding with ultrasonic frequency B24B1/04, perforating by sand-blasting B24C; e.g. abrasive blasting used for cutting B24C1/045; punching cards or tapes for statistical and record purposes G06K1/00
• CPC Class Codes: B26F 2210/12 of fabrics
• CPC Class Codes: Y10T 83/207 By suction means
• CPC Class Codes: Y10T 83/748 With work immobilizer

Abstract

The invention relates to a suction device for holding a stack of sheet material on a cutting table (A) of an automatic cutting machine. The suction device comprises a turbine (4) provided with a suction air inlet circuit (41) level with the cutting zone to establish suction for the purpose of holding the stack on the table, and with an air exhaust circuit (40), the turbine being driven by an electric motor (5) having a fan (15) and an air outlet duct (50), the electric drive motor (5) may vary its speed of rotation to adjust the amount of suction.

Claims

1. A suction device for holding a stack of sheet material on a cutting table of an automatic cutting machine, comprising:

a turbine having an air exhaust circuit for air exhaust from said turbine and an inlet circuit for air sucked in from a cutting zone to establish suction enabling said stack to be held on said cutting table;

an electric drive motor for driving said turbine, said electric drive motor fitted with a first fan, said first fan having an air outlet duct, said electric drive motor having a speed varying means for varying the speed of rotation of said electric drive motor so as to adjust the amount of suction; and

a junction between said air outlet duct and said air exhaust circuit, said junction having a curved internal flap to prevent reverse flow of air.

2. A device according to claim 1, wherein said device further comprises an additional cooling means for said electric drive motor.

3. A device according to claim 2, wherein said junction between said air outlet duct and said air exhaust circuit forms an exhaust air cooling means, said exhaust air cooling means cooperating with said additional cooling means for said electric drive motor.

4. A device according to claim 2, wherein said additional cooling means for said electric drive motor comprises a second fan mounted on said air outlet duct from said first fan of said electric drive motor.