Yoshida Kogyo K.k.

Fuji Electric Co., Ltd.

Tadahiro Takamatsu

Akira Hasegawa

Shunji Miyamoto

Tetsuo Matsunaga

In drying a beltlike article such as a slide fastener tape by high-frequency induction heating, the tape is wound on the outer circumferential surface of a rotary drum heated from inside while rotating. An induction heating coil is mounted on the outer circumferential surface of a stationary drum, as an inner drum, with a gap with the inner circumferential surface of the rotary drum. The rotary drum is supported at one end by a rotary shaft via an adiabatic material. The stationary inner drum is made of a metal plate having a high heat conductivity for facilitating heat radiation of the heating coil, while the rotary drum is made of a cladding plate including iron and copper plates in combination.

Method and apparatus for drying beltlike article, and induction heater

A method of attaching sliders and top end stops to a pair of continuous slide fastener stringers, each stringer having successive spaced groups of coupling elements mounted on continuous stringer tape and interengaged with opposed complementary groups of coupling elements on the other stringer tape, there being successive pairs of opposed blank tape portions between the successive spaced pairs of coupling element groups. One of the successive pairs of opposed blank tape portions is spread apart. A slider is set and retained at a first fixed point between the spread pair of opposed blank tape portions. The opposed blank tape portions are then released so as to engage shoulders of a guide channel of the slider. Then the stringers are fed backwardly so as to thread the opposed blank tape portions through the guide channel of the slider. After that, the stringers are fed forwardly until end portions of an adjacent pair of coupling element groups are introduced into the guide channel of the slider. A pair of top end stops is set and retained at a pair of transversely spaced second fixed points so as to be threaded through the opposed blank tape portions. The stringers are then fed forwardly until endmost disengaged coupling elements reach the top end stops retained at the second fixed positions. Finally, the top end stops retained at the second fixed points are clinched about the respective inner longitudinal edges of the stringer tapes. An apparatus for carrying out this method is also disclosed.

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Toyama, Japan

Tadahiro Takamatsu