A Test Unit for Evaluating the Mechanical Endurance of Slide Fasteners (Zippers).

摘要

There is a need for a reliable and reproducible means of evaluating the performance and durability of slide fasteners (zippers). No standard test procedures nor equipments are presently available. This project was undertaken to develop a slide fastener tester with operational and constructional features which would be adaptable to evaluate different sizes and types of slide fasteners under conditions simulating actual usage. These evaluations would form the basis for (1) establishing a systematic procedure of applying the proper type slide fastener in the design and manufacture of different Army items and (2) determining the acceptability of slide fasteners in DoD procurement quality assurance operations. The work on this project resulted in the development of a prototype slide fastener tester. Its design was predicated on the operational features and controls engineered in the initial laboratory model. (Author)