A core for a roll of material

A core and coil technology, applied in the core field of coils, can solve problems such as cracking, machine damage, instability, etc.

Inactive Publication Date: 2007-11-07
CORE CONTROL INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Beyond a certain size during use, cores made of cardboard or plastic become unstable and prone to cracking
Instability and breakage are serious pot...

Method used

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  • A core for a roll of material
  • A core for a roll of material
  • A core for a roll of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Referring to Figure 1, there is shown a core 2 made of cardboard material. The core 2 is shown positioned between two mounting parts 4, 6 which are schematically shown and which may form suitable parts of a wide range of printing machines. The core 2 may be required to have a length of 700mm to over 4300mm. When the paper roll 8 is almost used up on the core 2, the core can be rotated at a speed of 1400-2900 rpm.

[0030] Figure 2 shows how the core 2 has a tendency to start spinning uncontrollably. As a result of the deformation of the core 2 into the shape shown in FIG. 2 , the core 2 is subjected to a high degree of vibration and rotates out of a straight line.

[0031] FIG. 3 shows what happens if the rotation of the core 2 continues when the core 2 is in the situation shown in FIG. 2 . More specifically, it can be seen from FIG. 3 that the core 2 has been broken into large sections loosened from the mounting part 10 . Large fractured sections 12 , 14 of the cor...

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PUM

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Abstract

A core (16) for a roll of material, which core (16) comprises a body portion (18), a first member which is removably secured to a first end (22) of the body portion (18), a first bore (24) through the first end member (20), a second end member (26) which is removably secured to a second end (28) of the body portion (18), a second bore through the second end member (26), a third bore (30) through the body portion (18), the first, second and third bores all having a common longitudinal axis, the first bore (24) having a smooth inner surface (32) whereby the first bore (24) is ale to receive a chuck (34) such that centering of the chuck (34) is facilitated by the smooth inner surface of the first bore (24), the second bore having a smooth inner surface (32) whereby the second bore is able to receive a chuck (34) such that centering of the chuck (34) is facilitated by the smooth inner surface (32) of the second bore, the body portion being made of a metal, and the first and second end members (20, 26) each being made of a plastics material.

Description

technical field [0001] The present invention relates to a core of a coil. The material may be printing paper used in the printing industry or other materials used in other industries. Background technique [0002] Known cores for rolls of printing paper are traditionally in the form of roll cores. These roll cores are usually thrown away when the paper roll on them has been used up. However, this represents a significant cost item; their disposal is wasteful from the point of view of the need to discard the cores and the need to provide new ones. Additionally, in the printing industry, technological developments have provided roll tracking systems for tracking rolls of paper as they are transported from paper mills to warehouses, docks, customer paper stores, and printing presses. These tracking systems involve labeling the core with an identification tag. Identification labels are also a significant cost item, and users are also dissatisfied with having to pay for ident...

Claims

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Application Information

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IPC IPC(8): B65H75/18
CPCB65H2553/52B65H2701/515B65H75/185B65H75/182B65H75/18
Inventor P·G·米尔顿
Owner CORE CONTROL INT
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