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] The can opener is pocket-sized, approximately 1.5 inches (38 mm) long, and consists of a short metal blade that serves as a handle, with a small, hinged metal tooth that folds out to pierce the can lid. A notch just under the hinge point keeps the opener hooked around the rim of the can as the device is "walked" around to cut the lid out.
The twist-key can-opener was patented by J. Osterhoudt in 1866. [7] There still was no general-purpose can-opener, thus each can came with a spot-welded or soldered-on twist-key can-opener which snapped off after fatiguing the metal by bending at a thin region. Each food-type had its own can-type, and came with its own can-opener-type.
Harbor Freight Tools won a declassification of the class action; that is, the court found that all the individual situations were not similar enough to be judged as a single class, and that their claims would require an individual-by-individual inquiry, so the case could not be handled on a class basis.
Fraze decided to create an improved beverage opening method that would eliminate the need for a separate device, leading to his creation of the pull-tab opener. His first design included a lever that pierced a hole in the top of the can, but this caused a safety hazard as it produced sharp edges that could cut the user's finger.
The top of the can was cut by pressing the cutting wheel into the can near the edge and rotating it along the can's rim. [5] The need to pierce the can first was a nuisance, and this can opener design has not survived. In 1925, a modern-style opener, equipped with an additional serrated wheel, was invented to improve Lyman's design. [3]
A simple opener is a piece of metal with a rectangular or rounded opening in one end and a solid handle large enough to be gripped between the thumb and forefingers on the other. The opening contains a lip that is placed under the edge of the bottle top, pulling it off when upward force is applied to the handle end of the opener.
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