Web severing device

A process for severing a continuous web having a path of travel between a pair of parallel spaced-apart first and second carriages disposed transversely to said web and straddling the path of said web, only said first carriage carrying a severing blade, which process comprises pivotally moving said second carriage in one direction in a plane substantially perpendicularly to said web path and toward said blade-carrying first carriage to narrow the spaced-apart distance between said carriages without moving said first carriage, preventing further pivotal movement of said second carriage in said one direction during any period of time in which a relatively non-flexible, rigid object such as a human finger is disposed between said carriages, and thereafter by further pivotal movement of said second carriage in said one direction causing said blade-carrying first carriage to be moved in the opposite direction toward said web path whereby said blade is moved into severing contact with said web.

A process for severing a continuous web having a path of travel between a pair of parallel spaced-apart first and second carriage disposed transversely to said web and straddling the path of said web, only said first carriage carrying a severing blade, which process comprises moving said second carriage in one direction in a plane substantially perpendicularly to said web path and toward said blade-carrying first carriage to narrow the spaced-apart distance between said carriages without moving said first carriage, preventing further movement of said second carriage in said one direction during any period of time in which a relatively non-flexible, rigid object such as a human finger is disposed between said carriages, and thereafter by further movement of said second carriage in said one direction causing said blade-carrying first carriage to be pivotally moved in the opposite direction toward said web path whereby said blade is moved into severing contact with said web.

A process for severing a continuous web having a path of travel between a pair of parallel spaced-apart first and second carriages disposed transversely to said web and straddling the path of said web, only said first carriage carrying a severing blade, which process comprises pivotally moving said second carriage in one direction in a plane substantially perpendicularly to said web path and toward said blade-carrying first carriage to narrow the spaced-apart distance between said carriages without moving said first carriage, preventing further pivotal movement of said second carriage in said one direction during any period of time in which a relatively non-flexible, rigid object such as a human finger is disposed between said carriages, and thereafter by further pivotal movement of said second carriage in said one direction causing said blade-carrying first carriage to be pivotally moved in the opposite direction toward said web path whereby said blade is moved into severing contact with said web.

A process for severing a continuous web having a path of travel between a pair of parallel spaced-apart pivotally supported first and second carriages disposed transversely to said web and straddling the path of said web, only said first carriage carrying a severing blade and said first carriage being spring biased against pivotal movement toward said second carriage, which process comprises pivotally moving said second carriage in one direction in a plane substantially perpendicularly to said web path and toward said blade-carrying first carriage to narrow the spaced-apart distance between said carriages without moving said first carriage, preventing further pivotal movement of said second carriage in said one direction during any period of time in which a relatively non-flexible, rigid object such as a human finger is disposed between said carriages, and thereafter by further pivotal movement of said second carriage in said one direction causing said blade-carrying first carriage to be pivotally moved against said bias in the opposite direction toward said web path whereby said blade is moved into severing contact with said web.