History of the Can Opener

Opening preserved food was a practical task that inspired successive tools, from piercing blades to rotating cutters. American patents from 1858 and 1870 reveal changing approaches, while historical accounts connect these mechanisms with grocery shops and household food preparation.

A container that needed another tool

Preserving food in a sealed metal container created another problem: getting it out. A historical overview in Smithsonian Magazine describes hammer-and-chisel opening as a manufacturer’s recommended method for early British cans. It also reports that grocery clerks opened cans for customers using Warner-type tools in nineteenth-century America. Opening a can could therefore be work performed at the shop before food reached the kitchen. These examples do not establish how every household handled canned food. Read the Smithsonian overview.

1858: piercing and cutting

Ezra J. Warner of Waterbury, Connecticut, received US patent 19,063 on January 5, 1858. His instrument combined a piercer, a curved cutter and a swinging loop that rested against the metal. The user pierced the can, inserted the cutter and repeatedly worked the handle, advancing the tool between cuts.

Warner also described a removable cutter, allowing a damaged blade to be replaced while retaining the rest of the instrument. This makes repair costs part of the design’s documented purpose. His claims about easy, safe operation were the inventor’s claims, rather than independent evidence of users’ experiences. Warner’s patent specification.

1870: a cutter that revolved

William W. Lyman of Meriden, Connecticut, received US patent 105,346 on July 12, 1870. His design combined a pointed pivot with a circular cutter. The point passed through the lid and turned beneath it; moving the handle around the pivot brought the rotating cutter through the metal.

The specification reveals a different sequence of hand movements: establish a pivot, engage the cutter and sweep the handle around. It still required an initial puncture. The patent documents this mechanism, but cannot tell us how many households bought it or how quickly they learned to use it. Lyman’s patent specification.

From inventions to everyday routines

Smithsonian’s overview places the familiar toothed-wheel crank design in the 1920s. The broader history is one of successive changes in how a tool engages and cuts a container. Smithsonian’s account of later developments.

The everyday-life interpretation is that opening preserved food involved a small but consequential piece of preparation work: someone had to control the container and operate the cutting tool before serving its contents. The sources used here establish particular designs and reported settings of use. They do not establish a single worldwide invention date, universal household ownership or a measured reduction in preparation time.

Explore more everyday objects.

Sources