Manufacturing container or tube from paper; or other manufacturi – Bending – Folding
Patent
1992-04-23
1994-02-08
Terrell, William E.
Manufacturing container or tube from paper; or other manufacturi
Bending
Folding
493433, B65H 45101, B65H 4516
Patent
active
052844676
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an improved sheet stop system against the collecting plane of a folding machine for a continuous paper band and is particularly applicable as an improvement of the high speed folding machine of the type described and claimed in the Italian Patent Application No. 22 536 A/88, filed on Nov. 27, 1988 in the name of the same applicant as the present one. This prior Italian application corresponds to U.S. patent application Ser. No. 430,512, filed Nov. 1, 1989, now abandoned and replaced with a continuation application Ser. No. 744,816 filed Aug. 12, 1991, and now allowed, U.S. Pat. No. 5,139,247.
Looking at the figures of the above Patent Application, a folding machine according to that invention consists of a supporting frame 10, in which a supporting plane 18 and two cylinder rollers 20 and 22 are housed, the said rollers being driven into rotation according to each other in opposed directions, and provided with hindering means 24 and 26 for preventing the starting portion of a continuous paper band from erroneously entering between either roller 20 and the said supporting plane 18. The hindering means 24 and 26 are provided with upper reliefs, 32 and 36 respectively, engaging grooves 40 and 44 formed in the rollers 20 and 22, and with lower reliefs, 34 and 38 respectively, engaged with side grooves 42 and 46 formed by milling the said supporting plane 18.
It is technically difficult and economically expensive to form said side grooves 42 and 46 in the said supporting plane 18. However by merely eliminating the lower reliefs 34 and 38, the present invention is directed to an apparatus which now prevents the starting or beginning portion of a continuous paper band from a possibly erroneous entering between the hindering means 24, 26 and the supporting plane 18.
The object of the present invention is that of avoiding said side milled grooves 42 and 46, it being however allowed to effectively stop the said starting portion of the paper continuous band between either hindering means 24 or 26 and the supporting plane 18. Said purpose is attained by providing a completely smooth supporting plane and by replacing the lower reliefs of the hindering means with pairs of vertically slidable fingers, positioned at the ends of said hindering means, which engage said supporting plane strictly enough to prevent the entering of the band starting portion between the hindering means and said supporting plane.
Preferably, said fingers consist of lower rod portions, abutting against said supporting plane, slidable with respect to supports fastened to said hindering means to follow possible movements of said supporting plane owing to the formation of a continuous folded band package on said plane, compelling the plane itself to lower.
In a preferred embodiment, said fingers consist of lower hollow rods in which are inserted upper solid rods fastened to said hindering means and slidable with respect to the hollow rods themselves for taking into account the supporting plane movement.
Alteratively, said fingers consist of solid lower rods inserted in hollow upper rods fastened to said hindering means and slidable with respect to the solid rods themselves for taking into account the supporting plane movement.
Preferably, the lower rods of said fingers are provided with bevelings on the side opposite to the one in which the paper band contacts the fingers and the supporting plane. More preferably, said lower rods are provided with a second beveling, contiguous and adjacent to the first one, transferring the support portion of the fingers substantially to a line at the region in which the paper band contacts the fingers themselves and the supporting plane for transferring the whole load of said fingers to the contact line with the paper band.
Further, between the movable portions and the fixed portions of said fingers can be interposed resilient means to improve the abutting strength of said fingers on said support plane.
The above listed features of the present invention, together with further feature
REFERENCES:
patent: 663667 (1900-12-01), Ross et al.
patent: 727304 (1903-05-01), Dauvergne
patent: 1606459 (1926-11-01), Waterworth
patent: 3037768 (1962-06-01), Anderson et al.
patent: 4358285 (1982-11-01), Fujino
patent: 4494948 (1985-01-01), Teyssier
patent: 5064179 (1991-11-01), Martin
Industria Grafica Meschi SRL
Terrell William E.
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