Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With work feeding or handling means
Reexamination Certificate
1999-01-12
2001-01-23
Hughes, S. Thomas (Department: 1726)
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With work feeding or handling means
C029S402030, C156S582000, C162S272000
Reexamination Certificate
active
06176287
ABSTRACT:
FIELD OF INVENTION
The invention relates to an apparatus for mechanically processing paper, hereafter called mechanical paper processing apparatus, in particular for embossing and joining two continuous strips of absorbent paper such as cellulose wadding, which apparatus is fitted with improved roller supports, and to a method for replacing the rollers of such an apparatus.
BACKGROUND OF THE INVENTION
More specifically, the invention concerns a mechanical paper processing apparatus, two paper strips each passing between two cylindrical embossing rollers, one roller being smooth and rubber-clad, the other being engraved and illustratively made of steel. The axes of the two engraved rollers run parallel and each roller is mounted rotatably about its axis between two support plates of the apparatus and both rollers configured tangentially to each other. In this apparatus design, a first of the engraved rollers is rotatably mounted on a cradle which is pivotable relative to a stationary apparatus base plate, the second engraved roller being mounted on this base plate, and furthermore each engraved roller is mounted in rotatable manner by means of cylindrical bearings at each roller end which are affixed in corresponding housings in the support plates respectively of the stationary base plate and of the pivoting cradle.
FIG. 1
illustrates a portion of a known apparatus for processing paper mechanically. It includes two engraved cylindrical rollers each mounted rotatably about a horizontal transverse axis between two vertical apparatus support plates each running in a plane perpendicular to the roller axes. Each roller includes a central shaft of which one end is mounted by means of a cylindrical bearing into a housing of the corresponding support plate. Illustratively, the cylindrical bearing may act simultaneously as a rotational roller guide and as a roller affixation means in the transverse direction. The cylindrical bearing furthermore may include means driving the roller into rotation and/or means accurately adjusting the roller axis position, in particular, to control the separation of the two engraved rollers or their relative axial positions.
When the engraved rollers must be replaced, for example for maintenance or to be exchanged for rollers offering a different embossing pattern, implementation will be time consuming and tricky.
The old roller(s) must be dismantled and thereby the cylindrical bearings must be removed. The reassembly of the cylindrical bearings and the replacement roller(s) is time consuming and laborious because of the many necessary adjustments.
OBJECT AND BRIEF DESCRIPTION OF THE INVENTION
The objective of the invention is a new apparatus design to mechanically process paper allowing exchange of the engraved rollers more rapidly, in particular to lessen the time for such a replacement during which, necessarily, machine output has stopped.
For that purpose, the invention involves the above apparatus which is characterized in that the cylindrical bearings of at least one of the engraved rollers are affixed into housings which are bounded at least in part by a detachable bracket that, in the detached state, frees a radial aperture through which the cylindrical bearings can be radially removed from the housing.
Other features of the invention are the following:
the radial housing aperture runs across the full thickness of the support plates in the transverse direction of the roller axes,
the two engraved rollers are fitted with cylindrical bearings affixed in housings partly bounded by detachable brackets,
the cradle supporting one of the engraved rollers pivots about a transverse axis parallel to the roller axes between an operational position wherein the two rollers are tangent to each other and a free position allowing disassembly of the engraved rollers, the support plates
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,
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of the cradle and of the base plate being configured substantially in one plane which runs perpendicularly to the transverse roller axes, and, once the brackets are detached, the apertures of the housings of the support plates on the base plate and of the cradle will radially face one another,
for the operational cradle position, each of the cradle support plates is substantially juxtaposed with a base plate support plate and their housing apertures each are fitted with a guide edge present as an extension of a guide edge of the aperture of the juxtaposed support plate,
a drive means is affixed on one side to the stationary base plate and on the other side to a cradle support plate, this drive means assuring pivoting of the cradle relative to the stationary base plate between the operational and the free positions.
Furthermore, the invention relates to a method for replacing the engraved rollers of a mechanical paper processing apparatus and including any one of the above features, the method being characterized by inclusion of the following stages:
pivoting the cradle toward its free position,
detaching the brackets from the vertical cradle plates
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,
removing the first engraved roller by radially withdrawing its cylindrical bearings through their housing apertures in the support plates,
detaching the brackets from the vertical support plates,
moving the cradle back into its operational position,
removing the second engraved roller by radially withdrawing its cylindrical bearings through their housing apertures in the support plates.
The method of the invention includes further features, namely:
in order to remove the second roller, it is radially withdrawn by moving each of its cylindrical bearings from the housing of the vertical support plate on the base plate to the vertical support plate of the cradle along the mutually opposite guide edges of the apertures, the cradle being moved a second time toward the free position to allow removal of the second engraved roller,
the engraved replacement rollers are fitted with their own cylindrical bearings.
Other features and advantages of the invention are elucidated in the following description and in relation to the attached drawings.
REFERENCES:
patent: 5234271 (1993-08-01), Linstrom
Breiner & Breiner
Fort James France
Hong John C.
Hughes S. Thomas
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