Dispenser

Patent metadata

Field	Value
Publication number	US-8943938-B2
Application number	US-201013808283-A
Country	US
Kind code	B2
Filing date	Jul 7, 2010
Priority date	Jul 7, 2010
Publication date	Feb 3, 2015
Grant date	Feb 3, 2015

Abstract

A dispenser for repeatedly discharging a predetermined length of a continuous web of material, especially paper towels, comprises a feed roller ( 14 ) with the continuous web of material wound thereon and a cutting drum ( 20 ) incorporating a cutting device ( 24, 32 ), the continuous web of material being directed in contact to at least part of the cutting drum ( 20 ). The dispenser is characterized in that the cutting device ( 24, 32 ) comprises at least two cutting knives ( 24 ) with cutting blades ( 26 ), which cutting blades ( 26 ) are operable between an active, extended position projecting beyond the outer circumferential surface of the cutting drum ( 20 ), and an inactive retracted position; wherein each cutting knife ( 24 ) is provided with a cam follower ( 44 ) engaging a stationary cam path ( 46 ) of a camming mechanism ( 40 ).

First claim

The invention claimed is:

1. A dispenser for repeatedly discharging a predetermined length of a continuous web of material, the dispenser comprising:
a feed roller with the continuous web of material wound thereon;
a cutting drum incorporating a cutting device, the continuous web of material being directed in contact with at least part of the cutting drum;
the cutting device comprises at least two cutting knives with cutting blades, which cutting blades are operable between an active, extended position projecting beyond the outer circumferential surface of the cutting drum, and an inactive, retracted position;
a camming mechanism having a stationary cam path, the camming mechanism attached to the cutting drum;
each cutting knife is provided with a cam follower engaging the stationary cam path of the camming mechanism;
the at least two cutting knives are positioned diametrically opposite to each other relative to the cutting drum; and
the dispenser further comprises an elastic element arranged to rotate the cutting drum into one of two distinct equilibrium positions and to hold the cutting drum in the rotated position.

2. The dispenser according to claim 1 , wherein the elastic element comprises two spring elements, both of which are attached at one end to a stationary part of the dispenser and at the other end to an attachment point off-axis relative to the longitudinal axis of the cutting drum and movable together with the rotation of the cutting drum.

3. The dispenser according to claim 2 , wherein a diameter of the cutting drum is from 120 mm to 210 mm.

4. The dispenser according to claim 2 , wherein a diameter of the cutting drum is about 140 mm.

5. The dispenser according to claim 1 , wherein the feed roller is positioned so as to abut the cutting drum.

6. The dispenser according to claim 1 , wherein the cutting blade of each cutting knife has two main surfaces and an edge portion, wherein in the inactive, retracted position of the cutting blades, one main surface of each cutting blade essentially follows the outer circumferential surface of the cutting drum.

7. The dispenser according to claim 1 , further comprising a second camming mechanism having a stationary cam path, one camming mechanism being positioned at each longitudinal end of the cutting drum.

8. The dispenser according to claim 7 , wherein each of the two cutting knives is operatively connectable to a different camming mechanism.

9. The dispenser according to claim 1 , wherein the continuous web of material is paper towels.

Assignees

• Sahlberg Filip
• Sca Hygiene Prod Ab

Inventors

• Sahlberg Filip

Classifications

• B65H35/0006 Primary

  Article or web delivery apparatus incorporating cutting or line-perforating devices · CPC title

• A47K10/3643

  by pulling the paper · CPC title

• B26D1/1435

  for thin material, e.g. for sheets, strips or the like · CPC title

• Y10T83/896

  Rotatable wound package supply · CPC title

• Y10T83/4682

  With means controlling flying speed dependent on work speed · CPC title