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Posted by on Jun 29, 2015 in Tell Me Why |

Who Thought of Putting an Eraser on a Pencil?

Who Thought of Putting an Eraser on a Pencil?

Pencils with erasers are an American phenomenon. The first patent on an integral pencil and eraser was assigned in the United States on March 30, 1858, to Joseph Reckendorfer of New York City for an invention by Hymen L. Lipman of Philadelphia, who devised a method for enlarging the groove in the pencil sheath intended for the lead core so that it would accept an eraser.

Back in the 1850s, pencils and erasers had been invented, but they weren’t fastened together. If you made a mistake with a pencil, you had to find an eraser. In 1858, Rechendorfer took out a patent on his idea.

His pencils became very popular. This design though failed to catch on in many countries. “If you’re traveling outside the United States, you may notice that it’s hard to find a pencil with an eraser on it.

Pencil erasers are made of rubber mixed with pumice for erasing power. They crumble gradually when used. An eraser that does not crumble smears the marks without removing them completely.

Content for this question contributed by Seth Kopchak, resident of Pittsburgh, Pennsylvania, USA