How do electric staplers work?

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How do electric staplers work?

Electric staplers work by using a solenoid;

Open:A spring-loaded ‘hammer’ is pulled up into the tube and kept in place by the electromagnet.

Close:The spring drives the hammer downwards and onto the staple.

http://www.hs-stationery.com/news/why-is-the-electric-stapler-so-popular-huisheng

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