On demand cross web perforation

Apparatus for cutting or perforating a web, comprising:

• a knife cylinder having at least one cutting or perforating knife blade extending outwardly therefrom;
• an anvil cylinder having a plurality of substantially uniformly alternatively raised anvil surfaces for cooperating with said knife blade to effect cutting or perforation, and depressions adjacent the raised surfaces which do not effect perforation or cutting when cooperating with a said knife blade;
• a drive mechanism for driving said knife cylinder;
• and
• a servo motor operatively connected to said anvil cylinder to effect rotation thereof and for positively controlling the location of said anvil cylinder with respect to said knife cylinder during rotation of said anvil cylinder to selectively provide perforation or cutting, or no perforation or cutting.

Apparatus for cutting or perforating a web, comprising:

• a knife cylinder having at least one cutting or perforating knife blade extending outwardly therefrom;
• an anvil cylinder having a plurality of substantially uniform anvil surfaces for cooperating with a said knife blade to effect cutting or perforation, and a plurality of substantially uniform depressions alternating with said raised surfaces which do not effect perforation or cutting when cooperating with a said knife blade;
• a first drive mechanism for driving said knife cylinder;
• and
• a second drive mechanism for rotating said anvil cylinder in a first direction;
• and for substantially constantly and instantly indexing said anvil cylinder in a direction opposite the first direction to provide either perforating or cutting, or no perforating or cutting.