Transfer mechanism for sheet material dispenser

摘要

A dispenser for sequentially dispensing rolls of sheet material is described. The dispenser has an automatic transfer mechanism for transferring a reserve roll into a dispensing position once a primary roll has been depleted. The automatic transfer mechanism includes a diameter sensing member and a blocker rotatably coupled to the dispenser housing and biased to rotate in a opposite directions. The diameter sensing member and block cooperate with one another in order to block the reserve roll from contacting a drive roller until the primary roll has been depleted. The reserve roll held in the dispenser by two pivoting arms that are biased to rotate towards the drive roller.

主权项

1. A dispenser having an automatic transfer mechanism for dispensing at least first and second rolls of sheet material, comprising:
a housing defining an interior space; first and second roll holders at least partially disposed in the interior space and configured to releasably engage the first and second rolls; a drive roller configured to drive the sheet material from the second roll to a feed nip; a diameter sensing member movably coupled with the housing and biased to move in a first direction; a blocker movably coupled with the housing and biased to move in a second direction; wherein the diameter sensing member has a stop; and wherein the blocker has a catch that cooperates with the stop to impede the blocker from moving in the second direction until the diameter sensing member has moved to a predetermined position in the first direction due to dispensing the first roll of sheet material.