Hitachi Electronics Services Co. Ltd.

Link Laboratory Inc.

Hitachi Electronic Services, Co., Ltd.

Tadayuki Ichiba

Norikazu Yamagishi

Mutsuharu Takesada

Mineo Ogino

Jiro Takahashi

Akira Aoyama

Itsuku Ohtawa

Tsuyoshi Mizutani

Toshihito Ochi

Masato Tachibana

Masahiko Kurata

Hiromi Kawaguchi

Naoyoshi Machida

Method for collecting information about physical constitution of lan

Sheets of laminated paper are stacked and made into air-tight flat bags with air inlets. After air is supplied into the bags, the air inlets are air-tightly closed to form shock absorbers 50 encapsulating the air. The laminated paper is made by stacking on a paper base a water-soluble polyvinyl alcoholic layer, having a saponification of 80 to 90 mol % and a degree of polymerization of 500 to 2500, to a total thickness of 90 .mu.m or less and a gas permeability of 800 thousand seconds per 100 ml or more. The air is introduced into flat bags 51 to 50 to 80% of maximum inflation to ensure their shock absorbing function. A package 100 is made by putting an appropriate number of discrete shock absorbers 50, or a continuous series of shock absorbers 50, in gaps between a casing 10 and the package content 70. The shock absorbers 50 need not be spread all over the entire surface of the package, so long as they are sufficient to provide the needed contact area to ensure a maximum static load of 0.07 kgf/cm.sup.2 (around 20 kg in normal packages).

Shock absorber and package with shock absorbers

Growing community of inventors

Yokohama, Japan

Tadayuki Ichiba