US4694542 * 1986年2月14日 1987年9月22日 Koppe Lou W Foldable closure for flexible bags comprising flat sheet with integral axial hinge groove, lead in notch, and gripping apertureUS4694542 * Feb 14, 1986 Sep 22, 1987 Koppe Lou W Foldable closure for flexible bags comprising flat sheet ...
through rotation of motor-driven cam 99 in groove 100, causes high frequency oscillation (as for example at 50 to 80 Hertz) of rocker arm 101 about shaft 96. In an alternative arrangement, the combination of motor 98, cam 99 and rocker arm groove 100 may be replaced with a repeatedly an...