METHOD OF MAKING AN EARPLUG

• Main Authors: HAMER JEFFREY L, SEVILLE ALAN R, ENDLE JAMES P, TEETERS KENNETH F
• Format: Patent
• Language: English; Korean
• Published: 16.03.2020
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BANDAGES, DRESSINGS OR ABSORBENT PADS; CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; GENERAL PROCESSES OF COMPOUNDING; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PERFORMING OPERATIONS; PROSTHESES; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OR PROTECTION OF EYES OR EARS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

푸시-인 귀마개와 같은 개인 보호 장비를 제조하는 방법이 개시된다. 방법은 비활성화된 발포제를 포함하는 외부 층(330)으로 기재(310)를 덮는 단계, 외부 층의 적어도 일부분을 주형(370) 내에 위치시키는 단계, 및 외부 층의 일부분이 팽창하도록 발포제를 활성화시키는 단계를 포함한다. A method of making an earplug (100), is disclosed. The method includes the steps of covering an elongate core (210, 310, 410) with an outer layer (220, 320, 420) that includes an unactivated foaming agent, positioning at least a portion of the outer layer in a mold (270, 370, 470), and activating the foaming agent such that a portion of the outer layer of at least a portion of the outer layer to form a sound attenuating portion (221, 321, 421) and a stem portion (222, 322, 422) bonded to the elongate core.