Winding – tensioning – or guiding – Convolute winding of material – With feeder
Patent
1992-03-16
1994-08-23
Noland, Kenneth W.
Winding, tensioning, or guiding
Convolute winding of material
With feeder
312 3412, B65H 1600
Patent
active
053400453
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method for the sequential provision of portions of a towel web by means of a towel dispenser according to the pre-characterising clause of claim 1. Methods of this kind serve for providing a user with towel portions for drying his hands.
There is a known method of the relevant generic type (CH-A-561,535), in which both used and unused towel is released automatically via a towel dispenser in response to a trip. In this system, even if the user uses the front part of the loop consisting of unused towel, it is nevertheless very easily possible that he will also touch the used part of the towel. This is of no importance in normal hygiene requirements. However, in the medical and care sector and, for example, in industrial food production, the hygiene requirements are considerably more stringent than at the customary locations of towel dispensers. There, the possibility that the user will come in contact with used towel has to be preventable. Furthermore, used towel should be drawn in immediately so that bacteria which have possibly settled on it cannot spread.
On the other hand, it is highly undesirable for economic and ecological reasons to use more towel web than is necessary. The aim is, therefore, even where it is perfectly acceptable if a user touches used towel, to prevent the towel loop always being formed from unused towel only.
The invention is intended to remedy this. The invention, as characterised in the claims, provides a method in which the towel dispensing can be adapted to particular local needs or else those which change in the course of time.
The advantages of the invention are to be seen, above all, in that it affords the possibility of catering in a controlled way for special conditions of use, particularly those with special hygiene requirements, by means of special programs which can be selected by the maintenance or assembly personnel or the manager. Even the replacement of used towel webs by unused ones can be assisted by means of a program and thus simplified and speeded up.
When a suitable towel dispenser is employed, the programs can be so designed that dispensed but unused towel is retracted. In general, a more economical use of clean towel and therefore longer washing intervals are achieved, this being desirable from both economic and ecological points of view.
The invention is explained in more detail below by means of Figures illustrating merely an exemplary embodiment, a towel dispenser especially suitable for carrying out the method also being shown in detail. Of the Figures
FIG. 1 shows a side view of the right-hand side of a towel dispenser with towel inserted, the side wall being omitted,
FIG. 2 shows a front view of the towel dispenser, a front cover being omitted, and
FIG. 3 shows a top view of the right-hand side wall of the towel dispenser, a lateral cover being omitted,
FIG. 4 shows, enlarged, a cutout from FIG. 1 illustrating a movement sensor,
FIG. 5 shows a circuit belonging to the movement sensor,
FIG. 6 shows a flow diagram illustrating the method according to the invention, above all the parts run through in a state of rest being shown in detail,
FIG. 7a shows a flow diagram illustrating in detail the steps run through after a trip in a standard program,
FIG. 7b shows a flow diagram illustrating in detail the steps run through after a trip in a special hygiene program, and
FIG. 8 shows a further flow diagram illustrating in detail the detection of a use of the towel.
FIGS. 1 to 5 show a towel dispenser comprising, in a housing 1 mounted on a wall by means of its rear wall 2, a tiltably suspended shell 4 loaded by springs 3 with an upwardly acting force and intended for receiving an unused towel web 5 (represented by a dashed line) wound to form a roll, as well as a first transport device with a transport roller 6a which is covered with knobbed rubber and which is driven from an electric motor 9a via a worm gear consisting of a worm 7a and of a gearwheel 8a connected to the transport roller 6a. A half-disc 10a fastened to the worm 7a form
REFERENCES:
patent: 4826262 (1989-05-01), Hartman et al.
patent: 4848854 (1989-07-01), Kennedy
Arabian Sandro
Baumann Manfred
CWS International AG
Noland Kenneth W.
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