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When pressed together, they lock into place, creating an airtight environment.
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前天 15:18
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Opposing strips are heat stamped onto different sides of the coffee bag at the opening. One side has a channel, while the other side has a ridge.
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Coffee packaging differs slightly, as the resealable zipper is usually added to the packaging after the bag is made, as per client specification.
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With the new design, a new company was formed, and by 1973, resealable bags had become an indispensable item for the home.
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This process increased the functionality of the design and reduced the cost of manufacturing.
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However, in 1962, Ausnit learned of a Japanese company called Seisan Nihon Sha, which had discovered a way to incorporate the zipper into the bag itself.
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The original design of zip-lock bags required the zipper to be heat-sealed onto the bag, which was time-consuming and costly.
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How are resealable zippers made?
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a man holding numerous custom-printed multilayer coffee bags with resealable zippers in an article on whether resealable zippers in coffee coffee bags are recyclable.
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And so, born of necessity, resealable bags offer consumers the convenience of preserving the freshness of the coffee without having to transfer the beans or ground coffee into another container.
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Additionally, the loss of volatile compounds in the coffee and oxidation will have a noticeable effect on the quality within a few hours of exposure.
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Once coffee packaging is open, the deterioration of the product will accelerate owing to exposure to moisture and oxygen.
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The product experienced massive success and has become as ubiquitous as the problem it addresses: maintaining the freshness of food. Or, in this case, coffee.
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The new zip-lock bags were manufactured in two parts: the press to seal section and the plastic bag.
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He thought of making this mechanism because the manufacturing the former version of the Ziploc bags was quite expensive.
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It is Max��s son, Steven, who is credited with designing the zippers commonly used today.
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Early designs of the bags and zippers required a small piece of plastic, which had to be slid from one end to the other in order to seal the bag.
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That said, the brothers refined the design and manufacturing process to make the bags easier to use and cheaper to produce.
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Madsen then sold the patent for the design to Max and Edgar Ausnit, who created the company Flexigrip and began manufacturing ��resealable�� bags that featured a plastic zipper.
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Resealable bags, now more colloquially known as zip-lock bags, were first invented in the 1950s by a Danish inventor named Borge Madsen.
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