 Whitcomb Judson, muna 1891, akagadzira chii chekusunga shangu?Muna 1891, Whitcomb Judson akagadzira zipper senzira yekusimbisa shangu. Iyo yekutanga vhezheni yezipi yaizivikanwa se Clasp Locker uye yainyanya kuitirwa kupa nzira iri nyore yekuchengetedza nekusunungura shangu. Nepo kushandiswa kwayo kwekutanga kwaive kweshangu, dhizaini yezipi yakashanduka nekufamba kwenguva, uye kuita kwayo kwakatungamira mukugamuchirwa kwayo mumaindasitiri akasiyana siyana, kubva pakupfeka kuenda kumikwende nekupfuura. Kugadzirwa kwezipi kwakashandura masungiriro atinoita uye kuchengetedza zvinhu, zvichipa imwe nzira inoshanda kune mabhatani netambo. 