Apparatus for dispensing successive zones of a disposable strip

• US 5,707,197 A
• Filed: 04/29/1996
• Issued: 01/13/1998
• Est. Priority Date: 05/02/1995
• Status: Expired due to Fees

• Current Assignee: Asulab SA (The Swatch Group AG)
• Original Assignee: Asulab SA (The Swatch Group AG)
• Inventors: Jaeger, Gerard
• Primary Examiner(s): Merritt, Karen B.
• Assistant Examiner(s): Morse, Gregory A.
• Application Number:
  US08/639,902
• Time in Patent Office: 624 Days
• Field of Search: 30/40.1, 221/18, 221/19, 221/20, 221/152, 414/14, 604/403, 604/407
• US Class Current: 414/14
• CPC Class Codes: B01L 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: G01N 33/48757 Test elements dispensed from a stack

Abstract

This apparatus operates with disposable strips which are inserted therein by a user. It comprises a circulation passage (29) for the strips (34) wherein a cursor (35) is able to slide, each strip being able to be coupled to the cursor. A mechansim is provided so that the cursor (35) is able to move in the passage (29) only if it is coupled to a strip. Moreover, the cursor (35) remains blocked in the vicinity of the opening (28) of the circulation passage when no strips (34) are present. This invention can be applied in particular to objects dispensing devices such as medical tablets or to blood sugar level measuring devices.

Claims

1. A dispensing apparatus requiring the use of disposable elements having the shape of strips to operate, each of these strips comprising in the longitudinal direction several successive utilisation zones intended to be detached from the strip after their use, said apparatus comprising:

a case defining a circulation passage for said strips, said passage having, taking account of the direction in which said strips are introduced, an upstream end and a downstream end,

a forward feed mechanism for bringing said strip out of the circulation passage in accordance with a step by step movement after its introduction into the latter by a user,

a sliding unit mounted so as to move in said passage, operationally coupled to said forward feed mechanism and intended to be coupled to the corresponding end of said strip when it is introduced by the user, and

coupling means carried by said sliding unit and arranged so as to assure the coupling between the latter and said strip,

said case also defining stop forming means situated at the upstream end of said passage, and in that it comprises in addition blocking means arranged to assure, in cooperation with said stop forming means, the blocking of said sliding unit in an upstream position of said passage in the absence of a strip in the latter and to release said sliding unit to move in said passage when the downstream end of said strip is coupled to said sliding unit.

2. An apparatus according to claim 1, wherein said blocking means are arranged to only allow the release of said sliding unit when the coupling between said strip and said unit is completed.

3. An apparatus according to claim 2 wherein:

said blocking means comprise first and second resilient members;

said stop forming means comprise first and second stops intended to co-operate respectively with said first and second resilient members so as to oppose movement of said sliding unit from the upstream end towards the downstream end, until said coupling between said strip and said sliding unit has been completed;

said first resilient member also defines a coupling member of said coupling means intended to engage with said strip when the latter is coupled with said sliding unit; and

when said strip is introduced, said first resilient member cannot move aside from said first stop to be coupled to said strip, before the second resilient member is released from said second stop.

4. An apparatus according to claim 3, wherein said resilient members are leaf springs fixed at one end onto said sliding unit, extending in the direction of the circulation passage and carrying at their other end a finger blade intended to co-operate with said corresponding stop.

5. An apparatus according to claim 4, wherein the finger blades of said leaf springs are arranged to cooperate with an edge in the shape of a ramp of each of said strips.

6. An apparatus according to claim 4, wherein the finger blade of said first resilient member is arranged to engage in a notch provided in the lateral edge of each of said strips to assure the fixing of the strip to said sliding unit.

7. An apparatus according to claim 4, wherein said stop forming means also comprise an additional stop and a ramp situated at the upstream end of said passage and intended to co-operate with said finger blade of said first resilient member to oppose the removal of said sliding unit from said passage.