GB2081200A

GB2081200A - Pneumatic Tube Carrier

Info

Publication number: GB2081200A
Application number: GB8105679A
Authority: GB
Original assignee: LAMSON D D Ltd
Current assignee: LAMSON D D Ltd
Priority date: 1980-02-25
Filing date: 1981-02-23
Publication date: 1982-02-17
Also published as: GB2081200B

Abstract

A carrier, for pneumatic tube carrier systems which are likely to be installed in locations where space is limited and in which, for example, the carriers are conveyed from one of a plurality of stations to a central station through a tube which because of the limited space has bends of tight curvature, has a bag body part of flexible material, such as canvas, leather or other fabric or plastics material, and has a mouth open at one end through which bank notes or other matter may be inserted into the body part and has at least two vanes 24 provided at opposite sides of the mouth of the body part. <IMAGE>

Description

SPECIFICATION Improvements in or Relating to Pneumatic Tube Carriers This invention has reference to pneumatic tube carriers. For many years it has been known to provide pneumatic tube systems, for example for use in multiple stores, which systems comprise a main station and a plurality of subsidary stations, each subsidary station being connected to the main station by a pneumatic tube, and the system embodies means to convey carriers from the subsidary stations to the main station and return the carriers to the station from which they were despatched. When such systems are installed in multiple stores the subsidary stations are located at a point of sale and so arranged that a carrier receives a sale slip on which is recorded details of a transaction together with cash to effect payment for goods the subject of transaction.The carrier is despatched to the main station where the sales slip is processed and receipted and returned to the subsidary station together with any change.

In many stores, for example, in supermarkets, goods are selected from the shelves of the supermarket by customers and taken to check out points where the customer pays for the goods taken from the shelves.

The money taken for the goods is stored in cash tills at the respective check out points and constitute a high security risk in so far as potential theft is concerned. The risk is especially high and special procautions have to be taken when a supervisor collects cash from the check out points from time to time, and more particularly when such collections are made at peak trading times, to be deposited in a safe deposit within the supermarket premises.

It is an object of the present invention to provide an improved pneumatic tube carrier.

It is a further object of the present invention to provide an improved pneumatic tube carrier for enabling cash to be transported from a vunerable point of sale to a safe deposit.

It is further object of the present invention to provide a tube carrier which is suitable for use with a pneumatic tube system embodying tight curves.

According to the present invention a pneumatic tube carrier system for use in a pneumatic tube system comprises a bag body part at least in part of flexible material and having a mouth opening at one end through which bank notes or other matter may be inserted and having at least two vanes provided at opposite sides of the mouth of the bag and extending away from the mouth.

A pneumatic tube carrier system in accordance with the present invention will now be described by way of example with reference to the accompanying drawings.

Fig. 1 is a diagrammatic view of the system; Figs. 2 and 3 are views of a receiving station and a sending station respectively; Figs. 4 and 5 are views of a bend in the tube system; Figs 6 and 7 are views showing a different bend; Figs. 8 and 9 are views of a junction and bend in the tube system; Fig. 10 is a view of part of a twist tube in the tube system; Figs 11 to 18 are views of carriers for use in the system and Figs. 19, 20 and 21 are further views of a tube.

Referring to Fig. 1 of the drawings there is shown in diagrammatic form a pneumatic tube system for use for example in a supermarket. A plurality of cash desks illustrated at 2 embody cash recording apparatus to record details of the goods purchased and particularly the price of the goods purchased in the supermarket as well as a cash till and the usual ancillary apparatus. These cash desks are shown located on the ground floor and on the first floor of the supermarket. A safe cash receiving area is shown on the second floor of the supermarket at 3. A pneumatic tube sending terminal 4 is located on or closely adjacent to each of the cash desks 2, and sending terminal is connected to a pneumatic tube 5 which in turn is connected to a receiving station 6 in the cash safe retaining area 3.

Each sending terminal 4 may be shown as in Fig. 3 and comprise a pneumatic tube terminal having a casing 7 with, as shown in Fig. 3 the end of the pneumatic tube 5 passing into the casing 7 from the bottom end. A security door 8 is positioned at the top of the casing and is normally positioned in the closed position (as shown in full lines in Fig. 3) but can be moved to the position as shown in chain lines when a carrier is to be inserted. A spring 8a or other biasing means causes the door to be retained closed and a microswitch 8b is located adjacent to the door which is operated when the door is opened. This switch is operative to prevent a carrier 9 from entering the tube 5 until the door 8 is closed again. The microswitch 8b serves to inhibit the operation of a solenoid (to be hereinafter described) as long as the door 8 is open.The switch 1 Ob is included in a cyclic priority circuit to enable carriers from the respective stations to be despatched in order of priority. Control means are included in the cyclic priority circuit to hand onwards from one station to the next station in sequence the priority of sending. The cyclic priority circuit associated with the various terminals are addressed in sequence and if the switch 1 Ob is operative the circuits associated with that terminal to control the despatch of a carrier are rendered operative provided the system is not already in operation. By this means one station is prevented from having priority of despatch of carriers without the other terminals having the opportunity to despatch.

The tube 5 within the casing is long enough to receive a carrier 9 and to close the door 8. A carrier sensor mechanism 10 is included in the casing 7 associated with a microswitch 10b to sense when a carrier 9 has been inserted into the pneumatic tube system. A solenoid mechanism 11 is included which is operative when a carrier is ready for despatch to move an air seal shutter 13 at the bottom of the terminal 4 adjacent to the tube 5 to permit air to enter the tube to allow the carrier to travel out of the terminal 4 into and along the tube 5. Normally the air seal shutter 13 seals off the respective air sending station when it is not required to send a carrier from that particular station but it is moved to the open or carrier despatching position to permit vacuum air to enter the station 4.The air seal shutter 13 is moved by the solenoid mechanism 11 whose armature is connected to a flexible steel strip of the shutter 1 8 which strip is mounted in guides 1 3a at opposite sides of the strip. Apertures 12 are formed in the tube 5 to permit air to enter the tube to permit the carrier to move along the tube.

When the solenoid 11 is operative its end remote from the end to which the flexible strip is attached extends closely adjacent to and into the path of the door 8 to prevent the door 8 being opened and a further carrier being inserted into the system where a carrier is being despatched.

As shown in Fig. 2 the receiving station 6 is connected to the receiving end of the tube 5 and the end of the tube 5 communicates with a chamber 1 6 to receive the carriers 9 despatched from the sending terminals 4. This chamber is large enough to receive all the carriers despatched from all the sending terminals during peak periods. The chamber 16 has a door 1 6a which is capable of being locked and being opened by a responsible person. The door preferably pivots outwardly so that the door is urged closed by the low pressure within the chamber 1 6. Located in a separate chamber 1 7 and beneath the chamber 16 is an air pump preferably an air exhauster 1 8 to exhaust air from the chamber 1 6 through an exhaust aperture 19.

The chamber 1 7 communicates with the chamber 1 6 through a connecting tube 20 and through the chamber 1 6 to the tube 5 and through the tube 5 to the respective terminals 4.

The sending terminals as shown in Fig. 1 are each located in close proximity with a corresponding cash desk 2 and a pneumatic tube 5 connecting the terminals 4 with the cash desk is required to take up the minimum amount of space. It is suitable to locate the tube 5 in the floortrunking but it is often more suitable to locate the tube in a false ceiling as shown on the first floor. Connection of the tubes can be achieved by providing bends 20 of tight curvature in the tube 5. Thus as shown in Fig. 1 the tubes 5 leading from the terminals 4 into the floor each pass through a tight bend 20 into trunking in the floor and through a further tight bend 21 into vertical channelling in a pillar or wall in the supermarket and thence to further channelling the ceiling on the third floor to the receiving station 6.

Also the tubes leading from the terminals 4 on the first floor each pass through a tight bend 20 into a vertical channelling and through another tight bend 21 into the false ceiling.

The sending terminals 4 can be located on the side of the desk (as illustrated at the two rear positions on the ground floor and on the first flour in Fig. 1) or underneath the desk (as shown at the front position on the ground floor and first floor in Fig. 1). The location of these terminals is decided by virtue of the space available adjacent to the cash desk and the convenience of the cash desk operator.

If desired additional terminals as indicated at 40 may be included to serve for example conveying paperwork or money from the station 40 to the receiving station 6.

The pneumatic tube 5 contains bends of tight curvature as shown in Figs. 4 and 5 and in Figs. 6 and 7 and bends of tight curvature with a junction as shown in Figs. 8 and 9. The tube as illustrated in Figs. 4 and 5 is of rectangular shape in cross section and may be fabricated by any suitable means and for example may consist of top and bottom parts with flanges and side part without flanges.

The curvature of the bends of the tubes is illustrated in Figs. 4 and 6. As shown in Fig. 4 a typical bend has a tight central curvature part having an internal curvature radius of 1 33 millimetres and an external curvature radius of 200 millimetres from the same point (P). This central curvature part is of larger cross section than the straight parts of the tube, that is to say the top and bottom of the tube and/or the respective sides of the tube are spaced apart by a greater distance than the top and bottom and respective sides of the straight parts of the tube.

The straight parts of the tube has a height (as shown in Fig. 5) of 55 millimetres and a width of 32 millimetres and as shown the ends of the bend parts are straight for a distance of 25 millimetres.

The intermediate parts of the bends joining the tight curvature centre part merges with the straight parts by respective intermediate curvature parts having an internal radius of 200 millimetres measured from point (R).

The tube shown in Fig. 4 and 5 curves in the plane containing the longer rectangular side of the tube 5 but the tube shown in Figs. 6 and 7 curves in the plane containing the shorter rectangular side of the tube 5.

A bend of tight curvature in conjunction with a junction is shown in Figs. 8 and 9 and the curvature of the centre part and the larger cross.

section is the same as shown in Figs. 4 and 5. The outer curvature of the central curvature part is merged through a tight turn with the part of the.

junction tube 5a. Similarly the dimensions of the parts merging with an adjacent tube 5b correspond with that shown in Figs. 4 and 5.

A tube for use in the system may be as shown in Fig. 10 and consist of a length of strip metal folded into a rectangular section tube 28. The side ends of the tube are interlocked at 28a to make the tube substantially air tight. The interlock 28a as shown is arranged centrally of one of the smaller opposite ends of the tube and extends lengthwise of the tube. The tube as shown in Fig.

10 is a twist tube which twists from a position with the longer side of the tube in the vertical plane to a position with the longer side in the horizontal plane.

In order that a carrier can be used in a tight curvature pneumatic tube system the carriers 9 are made wholly or partly of flexible material to accomadate the tube. As shown in Figs. 11 to 18 a carrier 9 is made of canvas leather or other fabric or plastics material and is of rectangular shape in cross section. As shown in Figs. 11 to 13 the carrier is slightly narrower at its leading end (to the right of the carrier as shown in Fig. 11 and has an angle of inclination towards the part of the carrier of about 20.

At the trailing end of the carrier are formed two flexible vanes 24 extending from the larger opposite sides of the carrier. These vanes are narrower at their outer ends. A closure member 25 also made of two flaps of canvas, or other fabric or plastics material, is secured to the inner face of its wider sides of the carrier. A closure clip 26 is provided near the outer end of the flaps which when closed retains the contents within the carrier. In a modified form of carrier, the carrier has flexible vanes extending from the two smaller opposite sides of the carrier instead of from the larger opposite sides. Also the closure clip 26 may comprise rough textile sealing material (for example as sold under the Trade Mark "Velcro") secured to a respective side of the closure flaps.

In the embodiment shown in Figs. 14 and 1 5 the carrier is made of canvas leather or other fabric or of plastics material and is slightly narrower at its leading end than at its trailing end.

The smaller opposite sides and the larger opposite sides of the carrier each have flexible vanes 24 extending from their trailing ends. The vanes are integral with the sides of the carrier.

In the further modified embodiment shown in Figs 1 6 to 1 8 the carrier 9 consists of a bag 33 of canvas leather or other fabric or plastics flexible material open at its trailing end and having vanes 24 extending from adjacent trailing end from the wider opposite sides of the carrier. The ends of the bag have a closure 25 of rough textile sealing material strips (sold under the Trade Mark "Velcro") for closing the bag and retaining it closed. Each of the larger sides of the bag is covered by a shield 35 of plastics material. This shield extends beyond the leading end of the bag and is turned inwardly towards the leading end to enable the carrier to ride over any obstructions on the inner face of the rectangular tube.

The carriers may be formed without the closure in which case the bank notes or other contents are retained in the carrier 9 by friction.

In operation of the system when a carrier is conveyed through the tube 5 the vanes of the carrier being flexible are urged into contact with the sides of the tube to form an air seal with the sides of the tube whereby air seepage between the carrier and the tube is reduced more particularly when the carrier is passing around a larger radius tight bend of the tube system. It will be apparent that the tube may curve in a horizontal or a vertical plane or even may curve in both horizontal and vertical planes so that the tube twists so that the carriers can move from a horizontal to a vertical plane. When a cashier finds that the note compartments of her cash till are becoming filled she extracts the notes and inserts them into the carrier 9 together with an indication of origin of the notes and/or other contents and closes the closure clip 26 of the closure member 25.She inserts the carrier into the sending terminal casing 7 into the position shown in Fig. 3 in chain dotted line and closes the door 8.

The control mechanism 11 operates to send the carrier 9. This operation may entail switching on the pump 17 and moving the shutter 13 to permit air at less than atmospheric pressure to draw the carrier 9 into the pneumatic tube and propel it to the station 6 where it is retained in the compartment.

The responsible person at a suitable time can remove the received carrier from the compartment 1 6 where the contents can be processed. The receiving station is located in a safe part of the building embodying safety means to prevent the iikelihood of burglary. The carriers are returned to one of the respective terminals by hand where they can be used again to transmit further filing of notes to the safe cash receiving area. Because of the use of the tight curvature of the pneumatic tubes the system can be embodied in a limited space. Also by virtue of the use of the flexible carriers and the flexible vanes 24 which tend to be pulled outwardly by the air pressure to assist in providing a good air seal between the carrier and the pneumatic tube these tight bends are usable in an efficient manner.

In modifications of the tubes used in the tube system and as shown in Figs. 1 9 to 20 there is shown a different construction of pneumatic tube 5 comprising a three sided base part 28 formed by folding sides 29 from a bottom part 30 and a cover part 31 having flanges 32 at the respective sides and which flanges are sealed to the side of the folded over sides by spot or tack welds or by brazing and sealed with sealant. Also as shown in Fig. 21 the tube may be formed of a four sided box part 36, with an opening extending iengthwise of the tube and with the opening closed by a cover part each side of which interlocks with the sides of the opening. The interlocks 38 extend longitudinally of the tube 5.

Although the invention has been described in relation to a security pneumatic tube system for use as a security measure in a supermarket in which the carriers are despatched in one direction in the tube system from a cash desk terminal to a central station and the carriers are returned by hand to the cash desk terminals the invention may also be applied to other applications. For example, it may be applied to a double tube system comprising a central station and with a plurality of subsidary stations and with a pair of tubes connecting the central station with the subsidary stations. Each of the tubes includes a plurality of bends of tight curvature in order that the system can be installed in a confined space. It is arranged that flexible carriers (for example of the kind shown in Figs. 11 to 18) are despatched from the subsidary station to the main station through one tube of the pair of tubes and returned to the main station through the other one of the pair of tubes.

It is envisaged that tubes of sizes different to those described may be used in the pneumatic tube system so that larger carriers, for use for example in conveying box files may be used. It is also envisaged that the system may be used for purposes other than conveying money or valuables.

Claims

1. A pneumatic tube carrier for use in a pneumatic tube system comprising a bag body part at least in part of flexible material and having a mouth opening at one end through which bank notes or other matter may be inserted into the bag and having at least two vanes provided at opposite sides of the mouth of the bag and extending away away from the mouth.

2. A carrier according to claim 1 wherein the mouth opening of the bag has closure means.

3. A carrier according to claim 2 wherein the closure means comprises a pair of closure flaps with strips of rough textile sealing material secured to the respective sides of the closure flaps.

4. A carrier according to any one of the preceding claims wherein the carrier has a shield of plastics material covering two opposide sides and extending beyond the leading end of the bag.

5. A carrier according to claim 1 wherein the shield is turned inwardly at its leading end.

6. A pneumatic tube carrier for use in a pneumatic tube constructed and arranged substantially as herein described with reference to the accompanying drawings.