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Method and apparatus for introducing powder into a pocket

A powder and hole bag technology is applied in the field of powder introduction into hole bags, which can solve the problems of inaccurate powder quantity and powder loss.

Inactive Publication Date: 2005-06-15
PFIZER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, powder may be lost during transfer from the powder bed to the carrier, and powder may remain on the inner and outer surfaces of the dispenser instead of being transferred into pockets as desired
This will result in an inaccurate amount of powder being introduced into the pocket

Method used

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  • Method and apparatus for introducing powder into a pocket
  • Method and apparatus for introducing powder into a pocket
  • Method and apparatus for introducing powder into a pocket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] As shown in FIG. 1( a ), a dispenser 10 is provided for transferring powder from a powder source 20 to pockets 32 of a carrier 30 . A driver or drive mechanism 40 is provided to operate or drive the dispenser 10 and a transfer mechanism 50 is provided to transfer the dispenser 10 from the powder source 20 to the pocket 32 ​​. The device is operated by a control system 60 which in particular can control the transfer mechanism 50 and the drive mechanism 40 .

[0060] Obviously, Figure 1(a) is highly schematic and is only used to illustrate the presence of the different components of the device. The drive mechanism 40 and transfer mechanism 50 may take alternative forms. Specifically, the transfer mechanism 50 may be in the form of a linear mechanism instead of the rotary mechanism shown in FIG. 1( a ). Of course, the purpose of transfer can be achieved by moving the powder source 20 and carrier 30 instead of moving the dispenser 10, that is, the powder source and carrie...

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PUM

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Abstract

A method and apparatus for introducing powder into a pocket ( 32 ) using a dosator ( 10 ) having an elongate cavity with an open end and a plunger ( 12 ) opposite the open end moveable along the cavity so as to define, between the plunger ( 12 ) and the open end, a space of variable volume, the method including, with the plunger ( 12 ) defining a volume greater than that of the pocket ( 32 ), inserting the open end into a source of powder so as to fill the volume with powder, positioning the open end over the pocket, driving the plunger so as to expel powder from the open end into the pocket and compress it to a predetermined bulk density and removing the open end from the pocket so as to leave the pocket full of powder with the predetermined bulk density.

Description

technical field [0001] The present invention relates to methods and devices for introducing powders into pockets, in particular pockets allowing powders such as inhalants to be transferred from a source and released into a carrier. Background technique [0002] It is known to use a powder bed to prepare dry powder for inhalation, and to use a dosator to transfer the powder from the powder bed into pockets of the carrier. Specifically, reference may be made to US3847191, US4542835 and US5826633. [0003] The powder bed is usually configured as a rotating disc with a doctor blade used to level the surface of the powder. In this way, a powder with a constant bulk density and a flat surface can be provided. [0004] The dispenser is provided as a sharp edged tube with a central plunger. The plunger is positioned such that it defines a space within the tube equal to the required powder dose. The doser is then inserted into the powder of the powder bed to fill this defined spa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65B37/20B65B1/36B65B63/02
CPCB65B1/366B65B63/02B30B15/302B65B1/36
Inventor 安德鲁·约翰·伊德彼德·约翰·乌泽歌约翰·马丁·休伊特
Owner PFIZER INC