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Erasers may be free-standing blocks (block and wedge eraser), or conical caps that can slip onto the end of a pencil (cap eraser). A barrel or click eraser is a device shaped like a pencil, but instead of being filled with pencil lead, its barrel contains a retractable cylinder of eraser material (most commonly soft vinyl). Many, but not all ...
A disposable version called Erasermate 2 was subsequently introduced, with an appearance similar to the non-erasable Write Bros. stick pen, except for a slightly larger girth, and of course the black eraser, affixed to the pen's cap. The eraser, similar to that of a standard no. 2 pencil, was about 5 mm in diameter, and 10 mm in length.
In 1979, Paper Mate introduced the Eraser Mate or Erasermate brand. [6] In the 1980s, Paper Mate invented the Replay 2000 pen, with erasable ink and a rubber at one end. In 2010, Paper Mate introduced "environmentally friendly" biodegradable pens, pencils and erasers. [7] In 2012, Paper Mate introduced the brand InkJoy. [8]
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A clutch pencil (or leadholder) tends to use thicker leads (2.0–5.6 mm) and generally holds only one piece of lead at a time. A typical clutch pencil is activated by pressing the eraser cap on the top, to open the jaws inside the tip and allow the lead to freely drop through from the barrel (or back into it when retracting).
Attached eraser on the left; Pencil lead on the right. On 30 March 1858, Hymen Lipman received the first patent for attaching an eraser to the end of a pencil. [35] In 1862, Lipman sold his patent to Joseph Reckendorfer for $100,000, who went on to sue pencil manufacturer Faber-Castell for infringement. [36] In Reckendorfer v.
A pencil case can also contain a variety of other stationery such as sharpeners, pens, glue sticks, erasers, scissors, and rulers. Pencil cases can be made from a variety of materials such as wood or metal. Some pencil cases have a hard and rigid shell encasing the pens inside, while others use a softer material such as plastic, leather or cotton.
A "Mr. Clean Magic Eraser" brand sponge, made from melamine foam. Melamine foam is a foam-like material consisting of a melamine-formaldehyde condensate. It is the active component of a number of abrasive cleaner sponges, notably the Magic Eraser. It is also used as thermal insulation and as a soundproofing material.
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