摘要:
A tape guide pin for recording and/or reproducing apparatus includes a base body made of non-magnetic material and a surface layer formed on the base body, made of non-magnetic hard material, the surface layer having the surface roughness whose microscopic tips are rounded. A method of manufacturing the tape guide pin for recording and/or reproducing apparatus includes the steps of: forming a base body of non-magnetic material; forming a surface layer of non-magnetic hard material on the base body; subjecting the base body and/or the surface layer to surface treatment for dimensional accuracy of circumferential surface; and fine-finishing for rounding the microscopic tips of the surface roughness formed by the surface treatment for dimensional accuracy.
摘要:
Pins of hinges connecting a toilet seat and a toilet lid to the body of a toilet bowl are formed as spring pins. The spring pins are tightly fitted in pin insertion holes and give desired rotational friction to the seat and the lid.
摘要:
A method of making a tape guide pin or sleeve adapted to directly engage the back of recording tape or the like, comprises applying a surface layer of a nonmagnetic hard material on a base body of nonmagnetic material and then forming microscopic tips on the circumferential surface of the hard-surfacing layer such that the pattern of the microscopic tips extend substantially linearly in the transverse direction to the axial dimension of the pin or sleeve. These tips are then fine-finished and thereby rounded. The tape guide has improved wear-resistance and frictional characteristics by comparison with even tape guides free from the surface roughening formed by the microscopic tips.
摘要:
A PROCESS AND APPARATUS FOR PRODUCING SPRING PINS BY AUTOMATICALLY CUTTING INTO A PREDETERMINED LENGTH A LENGTH OF RECTANGULAR PLATE BLANK SO AS TO HAVE A WAVE-SHAPED CUT EDGE AND WINDING THE BLANK INTO THE PIN SHAPE. THE APPARATUS INCLUDES A MANDREL WHICH SERVES AS A CORE AROUND WHICH IS WOUND THE BLANK, FOUR TOOL POSTS EACH HAVING ONE MOVABLE DIE RESPECTIVELY DISPOSED OUTWARDLY PERIPHERALLY AND RADIALLY OF SAID MANDREL, A CONTROL DEVICE DISPOSED UPON THE FRONT SIDE OF THE MACHINE FRAME UPWARDLY AND TO THE LEFT OF SAID MANDREL HAVING A MOVABLE CONTROLLING MEMBER AND A GUIDE STANK DISPOSED UPON THE FRONT SIDE OF THE MACHINE FRAME UPWARDLY AND TO THE RIGHT OF SAID MANDREL FOR GUIDING SAID BLANK, WHEREBY THE LEADING EDGE OF THE BLANK TRANSFERRED ALONG THE GUIDE STAND IS ABUTTED AGAINST THE CONTROLLING MEMBER SO AS TO CONTROL THE LENGTH OF CUT, THEREAFTER THE BLANK IS CUT INTO A PREDETERMINED LENGTH SO AS TO HAVE A WAVE-SHAPED CUT EDGE BY A PAIR OF MATING CORRUGATED CUTTERS FORMED ON THE OPPOSED SURFACES OF THE GUIDE AND THE DIE OF THE TOOL POST, THE CUT BLANK IS WOUND AROUND THE MANDREL BY THE DIES OF THE TOOL POSTS, SO AS TO FORM A SPRING PIN HAVING A WAVESHAPED GROOVE AND FINALLY THE MANDREL IS RETRACTED SO AS TO AUTOMATICALLY DROP THUS FORMED SPRING PIN.