Thread aspirating device for a dial group of a circular knitting machine

Patent metadata

Field	Value
Publication number	US-9988747-B2
Application number	US-201415032377-A
Country	US
Kind code	B2
Filing date	Nov 5, 2014
Priority date	Nov 11, 2013
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A thread aspirating device ( 1 ) for circular knitting machines, comprising a body ( 2 ) of the thread aspirating device having a lower side ( 3 ), defining an inlet opening ( 4 ) enabling inlet of one or more threads in the thread aspirating device, and an up per side ( 5 ), provided with an engaging portion ( 6 ) delimiting a passage opening ( 7 ) in the upper side. The thread aspirating device comprises a mouthpiece ( 10 ) extending between an open lower end ( 11 ), defining a mounting portion ( 12 ) complementarily shaped to the engaging portion, and an upper end ( 13 ) provided with an aspirating opening ( 14 ). The mouthpiece is superiorly mounted on the body of the device so that the mounting portion corresponds to the engaging portion; the mouthpiece and the body internally define an aspirating space ( 20 ) of the threads between the inlet opening and the aspirating opening. The mouthpiece and the body overall form, in mounting condition, a thread aspirating device in a single body.

First claim

The invention claimed is:

1. A thread aspirating device ( 1 ) for circular knitting machines, comprising:
a body ( 2 ) of the thread aspirating device having a lower side ( 3 ), configured to be mounted to a support plate of a dial group of a circular knitting machine and defining, when in a mounted condition to the support plate, at least an inlet opening ( 4 ) configured to allow the entry of one or more threads in the thread aspirating device, and an upper side ( 5 ), provided with an engaging portion ( 6 ) delimiting a passage opening ( 7 ) in the upper side;
a mouthpiece ( 10 ), distinct from the body ( 2 ) of the thread aspirating device, having a substantially tubular conformation and extending between an open lower end ( 11 ), defining a mounting portion ( 12 ) complementarily shaped to the engaging portion ( 6 ) of the body of the thread aspirating device, and an upper end ( 13 ) provided with an aspirating opening ( 14 ) configured to be connected to an air aspirating device for generating a negative pressure internally of the thread aspirating device and realize an aspiration of one or more threads into the thread aspirating device via the inlet opening ( 4 );

wherein the mouthpiece ( 10 ) is superiorly mounted on the body ( 2 ) of the thread aspirating device in such a way that the mounting portion ( 12 ) of the mouthpiece corresponds to the engaging portion ( 6 ) of the body ( 2 ) of the thread aspirating device and the mouthpiece ( 10 ) and the body ( 2 ) of the thread aspirating device internally define an aspirating space ( 20 ) of the threads extending between the inlet opening ( 4 ) and the aspirating opening ( 14 ), wherein the mouthpiece ( 10 ) and the body ( 2 ) of the thread aspirating device overall form, in mutual mounting condition, a thread aspirating device ( 1 ) in a single body configured for aspirating internally thereof, and maintaining in the aspirating space ( 20 ), one or more threads in infeed to the knitting machine, wherein the inlet opening ( 4 ) is defined along a lateral edge ( 8 ) of the body ( 2 ) of the device ( 1 ),
and wherein the lateral edge ( 8 ) of the body of the thread aspirating device has an arched conformation characterised by a determined radius of curvature and a determined lateral extension, which define a device measure, the device measure being directly correlated to the diameter of the needle cylinder of the knitting machine to which the thread aspirating device is configured to be mounted.

2. The thread aspirating device ( 1 ) of claim 1 , wherein the thread aspirating device is configured to be positioned in a dial group of a knitting machine and is configured so as to suck in one or more threads and respective fluff, or wherein the lateral edge ( 8 ) is configured to be positioned, with the device in the mounted configuration to the support plate of a dial group, at a portion of a perimeter edge of the support plate and superiorly thereof, in such a way as to be superiorly aligned with a thread transport and cutting element, rotatably mounted externally of the support plate.

3. The thread aspirating device ( 1 ) of claim 2 , wherein the determined radius of curvature of the lateral edge ( 8 ) of the body ( 2 ) of the thread aspirating device is substantially equal, or proportional, to half the diameter of the needle cylinder of the knitting machine to which the thread aspirating device ( 1 ) is configured to be mounted.

4. The thread aspirating device ( 1 ) of claim 1 , wherein the mouthpiece ( 10 ) is structurally dimensioned and conformed in a single way, in particular as regards the shape and dimensions of the mounting portion ( 12 ), regardless of the diameter of the needle cylinder of the knitting machine to which the thread aspirating device is configured to be mounted, while the body ( 2 ) of the thread aspirating device, to which the mouthpiece is to be mounted, is selected from a plurality of possible thread aspirating bodies, which have in common a shape and dimensions of the engaging portion ( 6 ), complementarily shaped to the mounting portion ( 12 ), and differ as far as the respective thread aspirating device measure is concerned, the device measure being selectable without modifying the structure or dimensions of the mouthpiece ( 10 ).

5. The thread aspirating device ( 1 ) of claim 1 , wherein the body ( 2 ) of the device ( 1 ) and the mouthpiece ( 10 ) are made of different materials.

6. The thread aspirating device ( 1 ) of claim 1 , comprising at least a seal element ( 18 ) interposed between and in contact with the mounting portion ( 12 ) of the mouthpiece ( 10 ) and the engaging portion ( 6 ) of the body ( 2 ) of the thread aspirating device, the seal element ( 18 ) being configured so as to guarantee an air seal between the mouthpiece and the body of the thread aspirating device ( 1 ), when the thread aspirating device is mounted.

7. A set of thread aspirating devices ( 1 ) for circular knitting machines, the set comprising:
a plurality of bodies ( 2 ) of the thread aspirating device each configured to realize a respective thread aspirating device, each body of the device having a lower side ( 3 ), configured to be mounted to a support plate of a dial group of a circular knitting machine and defining, in a mounted configuration to the support plate, an inlet opening ( 4 ) configured for enabling inlet of one or more threads into the thread aspirating device, and an upper side ( 5 ) provided with an engaging portion ( 6 ) delimiting a passage opening ( 7 ) in the upper side, and wherein each body ( 2 ) of the thread aspirating device has the respective inlet opening ( 4 ) thereof defined along a respective lateral edge ( 8 ) of the body of the thread aspirating device, the lateral edge ( 8 ) being configured to be positioned, with the thread aspirating device in the mounted configuration to the support plate of a dial group, at a portion of a perimeter edge of the support plate and superiorly thereof, so as to be superiorly aligned with a thread transport and cutting element, rotatably mounted externally of the support plate, and wherein the lateral edge ( 8 ) of the body of the thread aspirating device has an arched conformation characterised by a determined radius of curvature and by a determined lateral extension, which define a device measure, the device measure being directly correlated to the diameter of the needle cylinder of the knitting machine to which the thread aspirating device is configured to be mounted;
a plurality of mouthpieces ( 10 ) each configured to realise a respective thread aspirating device, each mouthpiece ( 10 ) having a substantially tubular conformation and extending between an open lower end ( 11 ), defining a mounting portion ( 12 ), complementarily shaped to the engaging portion ( 6 ) of the bodies of the thread aspirating device, and an upper end ( 13 ) provided with an aspirating opening ( 14 ) configured to be connected to an air aspirating source so as to generate a negative pressure internally of the thread aspirating device and to realize an aspiration of one or more threads into the thread aspirating device by means of the inlet opening ( 4 );

wherein the dimension and conformation of the engaging portion ( 6 ) of all the thread aspirating devices ( 2 ) of the plurality of bodies of the device is single and corresponds to the dimension of the mounting portion ( 12 ) of all the mouthpieces ( 10 ) of the plurality of mouthpieces ( 10 ), and wherein each mouthpiece ( 10 ) is configured so as to be mountable superiorly to any body ( 2 ) of the thread aspirating devices belonging to the plurality of bodies of the device, such that the respective mounting portion ( 12 ) of the mouthpiece corresponds to the respective engaging portion ( 6 ) of the body of the threa

Assignees

• Santoni & C Spa

Inventors

• Lonati Tiberio
• Lonati Ettore
• Lonati Fausto

Classifications

• D04B15/61 Primary

  arranged within needle circle · CPC title

• D04B15/60 Primary

  with thread-clamping or -severing devices · CPC title