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A Fastener for use in a Corrugated Board
A fastener for use in a corrugated board includes a screw having a shank and a drilling portion, an expanding member fitted on the screw, and a washer disposed between the screw and the expanding member. 5 At least two engaging units are disposed on the shank of the screw. The expanding member has an engaging hole, the periphery of which has a plurality of engaging points adapted to engage the engaging units of the shank. Accordingly, the engagement between the engaging units and the engaging points allows the expanding member to aim at 0 the corrugated board without slanting and stably driven by the screw to attain a preferable cutting effect and increase the efficiency of the operation.
A Fastener for use in a Corrugated Board
A fastener for use in a corrugated board includes a screw having a shank and a drilling portion, an expanding member fitted on the screw, and a washer disposed between the screw and the expanding member. 5 At least two engaging units are disposed on the shank of the screw. The expanding member has an engaging hole, the periphery of which has a plurality of engaging points adapted to engage the engaging units of the shank. Accordingly, the engagement between the engaging units and the engaging points allows the expanding member to aim at 0 the corrugated board without slanting and stably driven by the screw to attain a preferable cutting effect and increase the efficiency of the operation.
A Fastener for use in a Corrugated Board
HUANG HSIEN-TSUNG (author)
2017-05-11
Patent
Electronic Resource
English
IPC:
F16B
DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES
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Vorrichtungen zum Befestigen oder Sichern von Konstruktionselementen oder Maschinenteilen, z.B. Nägel, Bolzen, Schrauben, Sprengringe, Klemmen, Klammern oder Keile
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E04D
ROOF COVERINGS
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Dacheindeckungen