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Rotary seamer

a seamer and rotary technology, applied in the field of rotary seamers, can solve the problems of allowing high precision and strength, and achieve the effect of strong and precis

Inactive Publication Date: 2010-05-13
CFT PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0020]An object of the present invention is to eliminate the aforesaid drawbacks and to make available a seamer in which the mounting of the seaming blocks on the respective shafts is fast and particularly strong and precise.

Problems solved by technology

In any case, known solutions are disadvantageous because they require is relatively long mounting times and they do not allow to reach high levels of precision and strength in the assembly.

Method used

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Examples

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Embodiment Construction

[0035]In FIG. 1, the reference number 1 designates a seamer according to the present invention, whereof is shown, in particular, a portion of a seaming turret 2 rotating around its own axis 3. To the seaming turret 2 are pivotally associated a pan 4 and a mandrel 5, which define a seaming site, to set a container 6 and a lid 7 in rotation around their own axis 8. The reference number 9 designates a seaming block provided with rotating idle pivots 10 (in particular a first and a second rotating pivot, but according to the seamer model there may be a single pivot per block and consequently the number of the blocks and of the pivots doubles). The seaming block 9 is anchored to a shaft 11 hinged on the seaming turret 2, such that it can rotate around its own axis 12.

[0036]FIG. 2 shows an exploded perspective view of the shaft 11 and of the seaming block 9. The shaft 11 has a first end 13, hinged in the seaming turret 2, and a second end 14.

[0037]The seaming block 9 internally defines a ...

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Abstract

A rotary seamer (1) comprises a seaming turret (2), a seaming station pivotally associated to the seaming turret (2) to set in rotation around its own axis (8) a container (6) to be seamed, a shaft (11) having a first end (13) hinged in the seaming turret (2), a seaming block (9) also called lever, defining a cavity (15) with longitudinal development, shaped complementarily relative to a second end (14) of the shaft (11) in such a way that it can be coupled thereto by inserting the shaft (11) into the cavity (15), and means (16) for anchoring transversely the seaming block (9) to the shaft (11), acting in a predetermined transverse direction (17) in such a way as to create at least one contact surface (20) between shaft (11) and cavity (15), said second end (14) of the shaft (11) and said cavity (15) being so shaped that said contact surface (20) has at least one oblique portion relative to the direction (17) in which said means (16) act. Currently, there are mainly two types of shaft ends for mounting the seaming block on the related shaft: the bevel one with disc shaped tongue and the grooved one. Both solution entail complicated mountings, with poor precision.

Description

TECHNICAL FIELD AND BACKGROUND ART[0001]The present invention relates to a rotary seamer.[0002]A seamer is a machine that enables to apply a lid to a container to close it hermetically, connecting the edge of the lid to the edge of the container by folding them one onto the other.[0003]Such containers have cylindrical geometry, e.g. they are constituted by cans.[0004]In practice, seaming is achieved by setting the container in rotation around its own axis, in a seaming station in which the container interacts with an appropriately shaped idle pivot, i.e. shaped such as to cause said folding of the edges of the container and of the corresponding lid.[0005]The seaming station is pivotally associated to a seaming turret, also called carrousel because it rotates around its own axis.[0006]According to the prior art in the field of seamers, during the seaming operation the container (rotating in the seaming station) interacts with a first and with a second idle pivot, in succession.[0007]...

Claims

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Application Information

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IPC IPC(8): B21D51/26B65B7/28B21D51/30
CPCB21D51/26B65B59/04B65B7/285
Inventor CATELLI, ROBERTOVALENTE, BARTOLOMEO
Owner CFT PACKAGING
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