Manufacturing container or tube from paper; or other manufacturi – Bending – Folding
Patent
1995-02-16
1997-08-19
Hail, III, Joseph J.
Manufacturing container or tube from paper; or other manufacturi
Bending
Folding
493418, 493458, 493960, B31B 120, B31B 124, B29C 5330
Patent
active
056582307
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for producing a protective layer for toilet seats. A protective layer for toilet seats has become known from the EP-B-0 331 631; said protective layer exhibits an oblong web, which is to be laid on the surface of a seat ring and is made of a thin and flexible sheet. The web of this protective layer is folded multiple times at right angles to its longitudinal direction and exhibits a leading edge, which is also folded at right angles to the longitudinal direction. If the ends of the folded web are grasped and pulled apart, the web unfolds and can be laid in a simple and reliable manner on a toilet seat. One special advantage of this protective layer is that it can be housed in comparatively little space.
The inventor has now set for himself the task of proposing a device with which a protective layer that is folded in this manner or in a similar manner can be produced; in particular a device in which the web is folded automatically.
The problem is solved in that the device exhibits an oblong guide element with at least one edge, by way of which a sheet is to be folded in its longitudinal direction; that clamping elements are arranged on the side of the guide element; and that the sheet can be grasped on both sides of the guide element with said clamping elements and can be slid in the longitudinal direction of the guide element or at right angles thereto in order to form a fold on each side of this guide element. The sheet can be slid in the longitudinal direction on the guide element and is grasped and slid by the clamping elements. The sheet can be folded over its entire length by means of repeated grasping and sliding operations by means of the clamping elements. It has been demonstrated that such a device can be realized with comparatively few, simple parts and still function very fast and reliably.
According to an improvement of the invention, there are two clamping elements that are spaced apart; a front-sided clamping element being moveable in relation to the guide element at right angles thereto and the other clamping element being moveable at right angles to the guide element and in the longitudinal direction of the guide element in the direction of the other clamping element. To form a fold, the sheet is affixed at the guide element with the one clamping element, whereas the other clamping element grasps and slides the sheet at a specific distance in relation to the front-sided clamping element. According to an improvement of the invention, a blowing device can be provided that conveys air against the open side of the sheet during a folding operation between the two clamping elements. The blowing device guarantees that the sheet between the two clamping elements folds outwardly. However, the blowing device can also be replaced, for example, by mechanically insertable fingers, wings or other suitable spreading elements.
The guide element exhibits preferably two parallel guide surfaces, against which the sheet rests and at which the sheet can be slid in the longitudinal direction of the guide element. According to an improvement of the invention, these two guide surfaces are spaced apart in such a manner that the folded sheet exhibits the shape of a U at right angles to the longitudinal direction.
According to an improvement of the invention, a clamping element is disposed in front of a front side of the guide element and another clamping element that can be moved against this front side is arranged at a distance from this front side. Even in this design the sheet is moved in the longitudinal direction step-by-step on the guide element. However, the cross section of the sheet is folded in the shape of a U via the guide element and is folded inwardly with the one clamping element, whereas the other clamping element moves simultaneously the region of the sheet to be folded against the guide element.
Other advantages and features of the invention follow from the dependent patent claims, the subsequent description and the drawings. Embodiments of the invention are expla
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Day Christopher W.
Hail III Joseph J.
Limark AG
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