Abstract: A method for producing a heat exchanger. A louvered fin is provided, where the louvered fin has a first bridge member for attaching a first corrugated strip and a straightening member of the louvered fin together. A first corrugated strip is fixed between first and second adjacent tubes of the heat exchanger such that the first corrugated strip is kept in a straight shape by the first and second tubes. The straightening member is detached from the first corrugated strip by breaking the first bridge member such that there is provided a first sandwiched structure having the first corrugated strip fixed between the first and second tubes.

Abstract: The corrugated fin feeding apparatus has cutting devices (1) producing corrugated (C1, C2) fins with a predetermined length and a conveying device (2) determining positions of the corrugated fins and conveying them at predetermined intervals. Further, the feeding apparatus has a forcible conveying device (3) which adds a driving force to the corrugated fins being conveyed by the conveying device (4) to push out them toward the downstream side thereof and distributes them in predetermined directions, and an accumulating device which accommodates the corrugated fins into a plurality of accumulating rooms respectively.

Abstract: A corrugated fin cutting device includes a pair of worms that restrains a position of a bottom portion of a corrugated fin material that is being continuously conveyed in a conveying direction, and a guide piece that approaches the bottom portion of the fin material that is being restrained by the pair of worms to determine a position of this bottom portion and moves in the conveying direction in synchronization with the fin material. Further, the corrugated fin cutting device includes cutting blades that move with the guide piece in the conveying direction and cut the bottom portion of the fin material that is positioned by the guide piece. The bottom portion of the fin material is cut when the guide piece passes the worms.

Abstract: A feedback controlled tension applying system includes a corrugated fin processing device that processes a fin material in continuous sheet form while applying a tension to the fin material. A tension applying device applies the tension to the fin material. An encoder measures a moving amount of the fin material, and a control device that feedback-controls the tension applying device based on a measurement result of the encoder so that the moving length amount per predetermined time of the material becomes a set value that is set in advance.

Abstract: The invention relates to a louvered fin for a heat exchanger. This louvered fin includes (a) a first corrugated strip having planar and connecting portions that are alternately arranged to make a corrugation, the first corrugated strip extending straight in a longitudinal direction; (b) first louvers formed in each planar portion such that the first louvers are arranged in a lateral direction, the first louvers in each planar portion being configured to be in asymmetry in the lateral direction; (c) a straightening member for keeping the first corrugated strip in a straight shape in the longitudinal direction, the straightening member extending along a longitudinal side of the first corrugated strip; and (d) a first bridge member for attaching the first corrugated strip and the straightening member together.

Abstract: A corrugated fin cutting device includes a pair of worms that restrains a position of bottom portion of a corrugated fin material that is being continuously conveyed in a conveying direction, and a guide piece that approaches the bottom portion of the fin material that is being restrained by the pair of worms to determine a position of this bottom portion and moves in the conveying direction in synchronization with the fin material. Further, the corrugated fin cutting device includes cutting blades that move with the guide piece in the conveying direction and cut the bottom portion of the fin material that is positioned by the guide piece. The bottom portion of the fin material is cut when the guide peace passes the worms.

Abstract: A feedback controlled tension applying system includes a corrugated fin processing device that processes a fin material in continuous sheet form while applying a tension to the fin material, a tension applying device that applies the tension to the fin material, an encoder that measures a moving amount of the fin material, and a control device that feedback-controls the tension applying device based on a measurement result of the encoder so that the moving length amount per predetermined time of the material becomes a set value that is set in advance.

Abstract: A method of manufacturing a refrigerant tube for a condenser includes forming an inner fin like a band plate having a predetermined length, forming a holder having a substantially V-shaped open section and a predetermined length, inserting the inner fin into the holder from a V-shaped opening of the holder, and pressing the holder to close the V-shaped opening and change the substantially V-shaped open section to a compressed closed section, whereby the inner fin is fixed in the holder.

Abstract: A slitting device including first and second cutting rollers disposed parallel to each other, a first guide roller axially adjacent to the first cutting roller, and a second guide roller axially adjacent to the second cutting roller. The cutting rollers have axially adjacent cutting edges at which a sheet material is cut into two strips, and recessed portions on the outer circumferential surfaces. The guide rollers have cutout portions circumferentially extending and axially opposed to each other on the outer circumferential surfaces, and projections defined by the cutout portions and opposed to the recessed portions of the cutting rollers. The cutting rollers cooperate with the corresponding guide rollers to define therebetween spaces for the strips of the sheet material. The cutting rollers and the guide rollers have a same outer diameter.

Abstract: The invention relates to a louvered fin for a heat exchanger. This louvered fin includes (a) a first corrugated strip having planar and connecting portions that are alternately arranged to make a corrugation, the first corrugated strip extending straight in a longitudinal direction; (b) first louvers formed in each planar portion such that the first louvers are arranged in a lateral direction, the first louvers in each planar portion being configured to be in asymmetry in the lateral direction; (c) a straightening member for keeping the first corrugated strip in a straight shape in the longitudinal direction, the straightening member extending along a longitudinal side of the first corrugated strip; and (d) a first bridge member for attaching the first corrugated strip and the straightening member together.

Abstract: A plurality of louvers are formed symmetrically on the two sides of the width-direction central portion of the inclined portion of a corrugated fin, and include, one-side louvers, which are formed integrally in one and the other ends of the central portion, are formed so as to project from one and the other ends of the central portion toward the advancing direction of the corrugated fin and louvers, which are formed on one and the other sides of the central portion, which are formed on one and the other sides of the central portion, are formed inclined on the same sides as the one-side louvers that are formed on one and the other ends of the central portion.

Abstract: For handling elongate and flat workpieces flowing in a manufacturing line, two arrangements are disclosed, one being an arrangement including a workpiece posture changing device which changes the posture of each workpiece at the time when the workpiece is transmitted from a first conveyer to a second conveyer, and the other being an arrangement for bundling the workpiece flowing in the manufacturing line.

Abstract: A slitting device including first and second cutting rollers disposed parallel to each other, a first guide roller axially adjacent to the first cutting roller, and a second guide roller axially adjacent to the second cutting roller. The cutting rollers have axially adjacent cutting edges at which a sheet material is cut into two strips, and recessed portions on the outer circumferential surfaces. The guide rollers have cutout portions circumferentially extending and axially opposed to each other on the outer circumferential surfaces, and projections defined by the cutout portions and opposed to the recessed portions of the cutting rollers. The cutting rollers cooperate with the corresponding guide rollers to define therebetween spaces for the strips of the sheet material. The cutting rollers and the guide rollers have a same outer diameter.

Abstract: For handling elongate and flat workpieces flowing in a manufacturing line, two arrangements are disclosed, one being an arrangement including a workpiece posture changing device which changes the posture of each workpiece at the time when the workpiece is transmitted from a first conveyer to a second conveyer, and the other being an arrangement for bundling the workpiece flowing in the manufacturing line.

Abstract: For handling elongate and flat workpieces flowing in a manufacturing line, two arrangements are disclosed, one being an arrangement including a workpiece posture changing device which changes the posture of each workpiece at the time when the workpiece is transmitted from a first conveyer to a second conveyer, and the other being an arrangement for bundling the workpiece flowing in the manufacturing line.

Abstract: A metal ring producing device comprises a rigid roller and a resilient roller. The resilient roller has an outer cylindrical portion covered with an elastic annular member. The resilient roller is positioned near the rigid roller so that a metal plate member can be inserted between the resilient and rigid rollers. The resilient roller is rotated in a given direction. The elastic annular member is formed with equally spaced recesses. Each recess has a concave bottom surface which is shaped in conformity with an outer surface of the metal ring produced around the rigid roller. A ring removing mechanism is further employed which pushes one end of the metal ring and thus thrusts the metal ring off the rigid roller when the resilient roller stops at a position wherein one of the recesses is registered with the rigid roller.