Automatic dispenser for paper towels severable from a continuous roll

• US 5,452,832 A
• Filed: 11/15/1993
• Issued: 09/26/1995
• Est. Priority Date: 04/06/1993
• Status: Expired due to Fees

• Current Assignee: QT Incorporated
• Original Assignee: QT Incorporated
• Inventors: Niada, Gianandrea
• Primary Examiner(s): JONES, EUGENIA A
• Application Number:
  US08/152,652
• Time in Patent Office: 680 Days
• Field of Search: 225/8, 225/10, 225/11, 225/15, 225/19, 225/23, 225/39, 225/42, 225/46, 225/47, 225/106, 242/564.1, 242/564.3, 242/564.4, 221/13
• US Class Current: 225/11
• CPC Class Codes: A47K 10/36 with mechanical dispensing, roll switching or cutting devices
• CPC Class Codes: A47K 10/3612 with drive and pinch rollers
• CPC Class Codes: A47K 2010/3668 Detection of the presence of a user
• CPC Class Codes: Y10T 225/202 With timer-released means for preventing work feed-out
• CPC Class Codes: Y10T 225/205 With feed-out of predetermined length from work supply
• CPC Class Codes: Y10T 225/206 Including means to select or adjust feed-out length
• CPC Class Codes: Y10T 225/247 Bearing or trunnions to engage package core

Abstract

An automatic dispenser for paper towels shaped in strips of an appropriate length severable from a continuous feed roll, outputs a portion of paper of an appropriate length cutting it with a stationary blade. The blade is located in a less accessible area of the apparatus for user safety reasons. Dispensing is usually controlled by a photoelectric cell or proximity detector, which actuates an ON-OFF switch for supplying power to a motor during a time period predetermined by a timer, thereby causing rotation of a dragging roller adapted to cause a certain extent of unrolling of the feed roll. In case of saturation of the photoelectric cell caused by improperly keeping it intercepted, an electronic switch disables the photo cell and enables an emergency push-button while also lighting a signal lamp to advise of a change in the operating condition, which requires a push of an emergency button.

Claims

1. An apparatus for dispensing paper towels severable from a continuous roll comprising:

a housing having a back plate, and a cover having a lower portion thereof being hingedly connected to a bottom portion of said housing, said cover including a dispensing port on the lower portion thereof;

a support for a paper roll;

a dragging roller and an opposing pressure roller for dragging a paper strip unrolled from said paper roll;

a motor for operating said dragging roller;

a cutting blade mounted in the dispensing port for severing a paper towel from the paper roll;

transmission means provided between said motor and said dragging roller, mounted on a side shoulder integral with said housing,

an ON-OFF circuit for supplying power to the motor for an adjustable, predetermined time period;

a photocell for actuating said ON-OFF circuit;

an electronic switch for supplying power to said ON-OFF circuit through a first enable circuit; and

an alternative enable circuit including an emergency push button in parallel with said first enable circuit to the input of said ON-OFF circuit for supplying power to the ON-OFF circuit during an emergency operating condition.

2. The dispenser of claim 1 further comprising a timer for setting the time period for supplying power to the motor, and a pause circuit for inhibiting power supplied to said motor, for an adjustable time period, said time period in which power is inhibited starting when the motor actuation has been stopped.

3. The dispenser of claim 2, wherein said timer and said pause circuit are both connected to both said first and said alternative enable circuits.

4. The dispenser of claim 2, wherein said cover is lockable by a lock to a top portion of said housing and is provided with a contact means to allow, when the cover is closed, usual operation wherein power is supplied through said first enable circuit and, when the cover is open, to cause said electronic switch to be switched to said alternative enable circuit for operation through the emergency push button.

5. The dispenser of claim 1, further comprising a transformer mounted on said back plate of the housing for supplying, at rectified reduced voltage to the motor through either one or the other of said enable circuits, said transformer and enable circuits being accessible from outside only upon removal of a support fastened to said back plate, after said dispenser has been removed from a supporting wall.

6. The dispenser of claim 1, wherein said paper roll support comprises a pair of cantilevered side members integral with the housing and having a substantially semicircular seat adapted to support the ends of a cylinder-shaped roller, the cylinder shaped roller being used as a core for said paper roll, the opposing pressure roller being mounted at the ends thereof in support plates integral with the housing, wherein springs are provided for biasing the pressure roller against said dragging roller, for maintaining a contact area between said pressure roller and said dragging roller. at least in a central area of both rollers.

7. The dispenser of claim 1, further comprising a light proximate said emergency push button, said light being lit each time said electronic switch is switched to supply power through said alternative enable circuit.