Joints and connections – Molded joint – Including mechanical interlock
Reexamination Certificate
1998-10-30
2001-10-30
Browne, Lynne H. (Department: 3629)
Joints and connections
Molded joint
Including mechanical interlock
C403S152000, C403S154000, C403S163000
Reexamination Certificate
active
06309133
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a process for fixing a guiding member on a support.
2. Brief Description of the Related Art
It is necessary to position each guiding member with respect to the bearing surfaces which receive it, in extremely meticulous manner. To that end, it is known to machine said bearing surfaces to precise dimensions with respect to a reference surface of the support, so as to produce openings in which the guiding members are introduced with reduced clearance.
However, such a process has certain drawbacks. In effect, it involves an extremely meticulous machining, which leads to long manufacturing time and high costs.
Moreover, in the case of apparatus with low mechanical strength, such as marking apparatus, the quality of geometry hoped for is not always obtained once the assembly is effected. In effect, the marking apparatus is capable of being deformed under the effect of the stresses exerted by the flanging occurring during the corresponding machining, or under the influence of the cutting efforts of the tools used for such machining.
In order to overcome the drawbacks of the prior art set forth hereinabove, the invention has for its object a process for fixing a guiding member on a support which ensures a precise positioning of these different elements with respect to one another, while generating limited mechanical efforts.
SUMMARY OF THE INVENTION
To that end, the invention relates to a process for fixing a guiding member on a support, in which at least one opening adapted to receive an end of the guiding member, is made in the support, and this end is introduced in the opening. The opening is made with transverse dimensions substantially greater than those of the end which is received therein. The guiding member is placed in the precise position that it must occupy, an intermediary space is thus defined between the outer periphery of the end and the opposite walls of the opening, which intermediary space is filled with a polymerizable resin and said resin is polymerized so as to secure the end with respect to the opening.
The process according to the invention enables the objects set forth above to be attained.
In effect, being given that each opening is made with transverse dimensions clearly greater than those of the end of the guiding member which is received therein, the corresponding machining requires no particular precision. It may therefore be effected much more rapidly than that employed in the prior art processes, and does not involve flanging of the different elements.
The phase of relative positioning of the guiding member and of the opening in which the latter is inserted, may be carried out by simple mechanical means, for example a system of wedging. This therefore does not induce considerable efforts that may alter the geometry of the apparatus once produced.
Finally, the polymerizable resin introduced within the intermediary space made between the guiding member and the opening which receives it, ensures a reliable fixation of each guiding member on the support.
The invention also relates to a guiding device obtained according to the above process, comprising at least one guiding member fixed on a support, each end of this member being housed in a corresponding opening made in the support. The opening has transverse dimensions substantially greater than those of the end of the guiding member, and a liner is formed by a polymerizable resin in the solid state being cast in situ between the outer periphery of this end and the opposite walls of the opening.
The guiding device may comprises one or more of the following characteristics:
the guiding member may slide axially with respect to the liner and, in the vicinity of each end of the guiding member, there are provided removable means for axially immobilizing this end with respect to the support;
the removable immobilizing means comprise at least one fixing element screwed in a wall of the support in the vicinity of the opening, a part of said element projecting at the opening so as to retain the end of the guiding member in abutment;
the end of the guiding member comprises a shoulder, the removable immobilization means comprising a pocket of resin, disposed in the vicinity of the shoulder;
the outer periphery of the ends of the guiding member is surrounded by means of a possibly bevelled ring;
an anti-adhesive coating is disposed on the outer periphery of the ends of the guiding member; and
the ends of the guiding member are connected by a median part of smaller section.
Finally, the invention relates to a marking apparatus comprising at least one guiding device as described hereinabove.
REFERENCES:
patent: 4263832 (1981-04-01), Lang et al.
patent: 4620814 (1986-11-01), May
patent: 5002411 (1991-03-01), Therond
patent: 5249898 (1993-10-01), Stepanski et al.
patent: 5368400 (1994-11-01), Cyphert et al.
patent: 35 19679 (1986-04-01), None
patent: 2109232 (1972-05-01), None
Browne Lynne H.
Dowell & Dowell , P.C.
Malcolm Tomlyne
LandOfFree
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