Electric heating – Inductive heating – With heat exchange
Reexamination Certificate
1999-03-17
2001-05-22
Leung, Philip H. (Department: 3742)
Electric heating
Inductive heating
With heat exchange
C219S068000, C219S635000, C083S016000, C083S053000, C030S140000, C392S379000
Reexamination Certificate
active
06236030
ABSTRACT:
TECHNICAL FIELD
The present invention relates to cutting and working technology using hot air.
BACKGROUND ART
Previously known methods for cutting various types of plastics such as foam plastic, moulded plastic and other porous materials such as textiles use laser technology which has the drawback that the material is burned. Ultrasound is also used to cut these types of material but has the drawback of being imprecise and “spongy”. High-pressure water jets are also used for cutting textiles but produce a messy edge. Electronic beam working also occurs in which electrons are thrown out from a cathode consisting of a tungsten wire, through a hole in an anode, subsequently adjusted magnetically and then concentrated by a magnetic lens. A working temperature of about 6000° C. is reached with this technology and electronic beam working is an unnecessarily complicated technology for the materials for which the present invention is suitable.
OBJECT OF THE INVENTION
The object of the present invention is to provide a method and a device for cutting and, to a certain extent, also working porous material such as foam plastic, moulded plastic and textiles, said method solving the problems of previously known methods and being simple, inexpensive and reliable.
SUMMARY OF THE INVENTION
Using compressed air which is forced into a heated tubular channel provides a hot-air jet which is forced out of a cutting nozzle at high pressure, this hot-air jet being used to cut and, to a certain extent work porous material such as foam plastic, moulded plastic and textiles.
REFERENCES:
patent: 2549362 (1951-04-01), Bessiere et al.
patent: 3445616 (1969-05-01), Guyer
patent: 3792989 (1974-02-01), Dahlberg et al.
patent: 3800991 (1974-04-01), Grove et al.
patent: 5288960 (1994-02-01), Rothe et al.
patent: 5901270 (1999-05-01), Quin
patent: 2508064 (1975-09-01), None
patent: 851473 (1960-10-01), None
Leung Philip H.
Neos Robotics AB
Ostrolenk Faber Gerb & Soffen, LLP
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