Abstract:
A lab consumable having a surface to display identifiers connected by a bridge encloses a tube. A specific sealer made up of hard and soft material is used close the tube. The connector for the sealer is made up of flexible, hard and various other material combinations. The surface where the identification is displayed has different surfaces and identifier. The identifier comprise of a number, alpha numerical, alphabets, symbol, barcode, customized sign, markings, hand written markings and a combination thereof.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     The instant application is a continuation in part of a pending U.S. application Ser. No. 13/798,078 filed on 13 Mar. 2013. The pending U.S. application Ser. No. 13/798,078 is hereby incorporated by reference in its entireties for all of its teachings. 
    
    
     FIELD OF INVENTION 
     The present invention is generally directed to a lab consumable having a numbered connector to hold the tube in form of a strip and an improved cap strip having a top with optically clear surface for more accurate reading and ergonomic when used in the laboratory. 
     BACKGROUND 
     Performing biological research and diagnostics testing process of real-time polymerized chain reaction (PCR) products and other processes require a number of tubes and are used in multiples of 2, 4, 6, 8, 12 or 96 at a time. The tubes can be erroneously interchanged or the written numbers on them by markers may wash of or be smudged while using it in the laboratory. This creates a monetary loss and time loss for the researcher as they have to repeat the experiment all over again. The sides of the tube, which is made out of polypropylene, are inherently slick because of the properties of the material, and are sharply curved because of the small diameter of the tube, and as a result are difficult to write on. It has therefore always been necessary to include a label which is either adhesively stuck to the centrifuge tube or attached to it with a translucent adhesive tape. There is no solution but to number it on the tube or the cap while conducting experiments at this particular time. The problem with the prior art is that it has been impossible to conveniently write on a centrifuge tube, PCR tube or any other small lab process tube in a consistent manner to identify it. If the tag is placed on the side of the tube, it cannot be read in many cases without removing the tube from its holding rack or container. If the tag is not secured onto the side of the tube properly, the irregularity of the tag can make it difficult to insert or remove the tube from its holding rack or container. Tags glued to the tops or caps of the centrifuge tube are often torn off when the tube is opened. None of these tags prove to be a satisfactory solution to marking the tubes. 
     Another issue that a researcher faces is, for manual application of real-time PCR microtube caps a researcher will typically align the caps, strips or films and body of the PCR tubes and apply 1 to 3 pounds per cm 2  of pressure on top of caps with their hands, thumbs and finger or other device. This also changes the shape of the top surface that would be subsequently used for optical measurement. With the current designs of products available in the market for real-time PCR the lens of the sealing caps, strips and films come directly in contact with hands, thumbs, fingers or automated sealing devices and adversely effects the surface of the lens for optical clarity. Direct contact of this type is not desirable. We need a solution to overcome these shortcomings. 
     In automated capping and sealing film machines the sealing platform applies direct pressure and or heat to the lens area of the PCR caps strips and films directly contacting the lens area. This direct contact to the lens area through which light will pass and be used to gather the PCR reaction data is not desirable for the many reasons. There is a need for producing a more optically conducive microtube cap. 
     SUMMARY 
     The present disclosure describes a lab consumable with a numbered connector to hold the tube and an ergonomically improved sealing cap with clear optical surface. Using such lab consumable with tube assemblies in biological reactions effectively prevents miss managing the samples in the tubes due to improper labelling, leaks, reduces loss of reaction volume due to better sealing and an optically clear surface on top for accurately reading of concentrations at the end of the experiment. 
     Accordingly, in a first aspect, the present invention provides a lab consumable assembly which comprises of a hollow vessel body having a substantially cylindrical upper wall section defining at its edge portion the opening of the vessel body as a tube, a numbered connector to connect the tubes in numerical order and cap having an ergonomic cap connector to form a strip of cap with recessed top for optical clarity. 
     In another embodiment, the lab consumable when assembled also has a cap comprising a substantially cylindrically shaped member (an inner ring) made up of soft material which is insertable through the opening of the tube body into the tube body and engages the upper ring section to hermetically seal the tube body. 
     In one embodiment, an ergonomic cap connector with a flexible bridge made up of different materials is disclosed. The ergonomic cap connector has multiple caps attached to it to hermitically seal the tube. The upper ring that is formed higher than the inner ring is firmer than the inner ring which is lower than the upper ring. The inner ring is made up of soft material so that the insertion to the tube cavity, residing in tube body, is easy and the user does not have to use much pressure during repeat actions. The ergonomic cap connector is connected by bridges which also has a soft material to connect each cap. The bridge can be made using several materials. 
     In one embodiment, a numbered connector is disclosed that connects several tubes in numerical order. A number is displayed on a specific surface that is raised on the numbered connector. The numbers may be etched, made as a hollow space depicting numbers and as a raised format to designate numbers for each tube. In this disclosure a number may comprise of a number, alpha numerical, alphabets, symbol, barcode, customized sign, markings, hand written markings and a combination thereof. In another embodiment, ring structure connected to the specific number surface and the bridge that connects the set of numbered surface and the ring connect to each other to form a strip is described. The ring also accommodates and secures the tubes inside so that they do not move or tilt during routine laboratory use. 
     In one embodiment, a method for using the lab consumable is described. The tubes are inserted into the rings of the numbered connector and then the cap strip is fixed on each tube to secure the contents of the tube. Due to two bridges that connect the numbered connector and the cap strip the tubes are rigidly supported and do not lose their orientation or get misplaced. The numbering of the specific surface (number surface) helps the user to identify and correctly record the samples without the samples being misplaced or misnumbered. 
     The product and method of using the product disclosed herein may be implemented in any means for achieving various aspects. Other features will be apparent from the accompanying drawings and from the detailed description that follows. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Example embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements and in which: 
         FIG. 1  is a view of series of tubes attached through a numbered connector and ergonomic strip of cap  100 . 
         FIG. 2  is a view  200  of tube attached through the numbered connector separated from the ergonomic strip of cap. 
         FIG. 3  is view  300  of tube attached by the numbered connector. 
         FIG. 4  is the close up view of the numbered connector. 
         FIG. 5  is the detailed top view  500  of the numbered connector  106 . 
         FIG. 6  shows the detailed view of the strip cap  102 . 
         FIG. 7  shows the side view of the strip cap  102 . 
         FIG. 8  shows a top view of the strip cap  800 . 
         FIG. 9  shows a detailed view of the strip cap connector  900 . 
         FIG. 10  shows an individual tube with a soft cap and numbered surface. 
     
    
    
     Other features of the present embodiments will be apparent from accompanying the detailed description that follows. 
     DETAILED DESCRIPTION 
     This invention relates to integration of three major components that form a part of the lab consumable. The three main components are, a hollow vessel body having a substantially cylindrical upper wall section defining at its edge portion the opening of the vessel body in essence called a tube, a numbered connector having a raised surface to display the numbers and a bridge to connect the tubes in numerical order and cap having an ergonomic cap connector to form a strip of cap with recessed top for optical clarity. 
       FIG. 1  shows a brief overview of the lab consumable  100 . Lab consumable  100  comprises of three parts. A cap with ergonomic cap connector  102  is shown as a strip and the cap tops have inundations. The numbered connector  106  holds the tubes  104  in numbered order. The numbered connector  106  has a raised surface to display the numbers (number surface). The tube  104  has a cylindrical body with an opening to receive the strip cap  102 . Each component will be described in detail in the following description and supporting figures. A lab consumable comprises of a numbered connector to connect the tube in numerical order, wherein the numbered connector consists of a bridge, a number surface to host a marking and a ring to accommodate the tube; and a cap having an ergonomic cap connector to form a strip of cap with recessed top for optical clarity and a sealer for the tube. The sealer has an outer edge ring that is an extension of an inner support ring to close the tube, wherein the outer edge ring is made up of a soft material. 
       FIG. 2  is a view  200  of tube  104  attached through the numbered connector  106  separated from the ergonomic strip of cap  102 . The strip cap  102  has an insert tab  202  that may be made up of soft materials such as thermoplastic elastomers. Insert tab  202  also has various parts and will be discussed below. The insert tab  202  of the strip cap  102  is used to close the opening  204  of the tube  104 . The circumference of the insert tab  202  is smaller compared to the opening  204  of the tube  104 . The softer material such as thermoplastic elastomer makes it ergonomically easy for the user to close the tube part  204  using insert tab  202 . Since the thermoplastic elastomers lends itself to be snug the tube  104  is hermitically sealed during routine laboratory heating, cooling and machine processing making this design of lab consumable the most efficient design to prevent sample loss. 
       FIG. 3  is view of tube attached by the numbered connector  300 .  FIG. 3  shows various parts of the tube  104 . The tube has a narrow end  302  that can hold a small amount of samples as low as 0.1 ul to 0.25 ul. The conical part  304  helps hold more sample as the structure increases gradually to the top and stabilizes at the rigid ring level  306 . The rigid ring  306  gives structural integrity to the conical structure  304  of the tube. The upper part of the tube is made up of a cylindrical structure  308  and  310 . The cylindrical structure  308  is higher than the numbered connector  106  and the cylindrical structure  310  is below the numbered connector  310 . This provides a stable insert for the ring of numbered connector  106  and will be discussed later. Tube part  202  houses tube ring  312 . The entire  104  tube is made up of materials such as polypropylene, biodegradable materials, combinations of various polymers etc. The tube  104  may be molded using different materials such as the lower conical structure  304 , the rigid ring  306 , the cylindrical part  310  and  308  may be of one material and to increase the sealing property the tube ring on the outer part may be made of more rigid polymer to withstand repeated opening and closing movements by the user and to not to lose the integrity due to various lab conditions such as heating and cooling. The size of the tube is for holding 0.01 ul to 0.20 ml of sample. They are essentially tubes for performing PCR, Q-PCR, RT-PCR like experiments in the lab. They need to be accommodated in special holders for centrifugation and other mechanical procedures in the lab. 
       FIG. 4  shows the details of the receiving tube opening  204  and the tube ring  312 . The outer lip  404  is a flat surface that provides structural integrity to the opening that receives the tube insert from the tube cap. The inner surface  402  is a smooth surface that enables the insert tab  202  to seal hermitically. The numbered connector has three parts. The bridge  406  connects the ring  408  with each other. The ring also houses the raised numbered surface  410 . The numbered connector  106  is made up of a thermoplastic elastomer. However, the bridge  406  may also be made of more rigid materials and/or combination of polymers, soft material, combination of soft and hard material. The ring  408  has a conical surface. The narrower surface connects with the tube  104  and the wider surface provides a wider base for the bridge to sit and connect with the ring. The adjacent rings  408  are separated so that the bridge  406  is flexible and provides ergonomic comfort to the user for inserting and handling the tubes. The bridge  406  may be molded into the rings, or made to slide into the connection, or snap fit to each ring as the requirement for the tubes as a tube strip needs to be increased. The entire three parts may be made up of individual units that comprises of three parts such as the ring, the raised number surface and the ring. They may be connected to each other by connecting the bridges as a snap on fit or a slide fit by connecting at the ring. The flexible bridge connects the number surface and the tube in sequential order. 
       FIG. 5  shows the detailed top view  500  of the numbered connector  106 . One unit of the numbered connector  106  comprises of a ring  506 , a raised numbered surface  410  and a bridge  406 . The ring  506  has an outer part  504  and an inner part  512 . The outer part  504  provides support for the bridge  406  and raised numbered structure  410 . It wide and horizontal to the inner part  512 . The inner part  512  has an inclined slope to fit snugly to the tube  104  and does not allow the tube to shake sideways. The inner part  512  provides a support to the outer part  504  to be housed on it. The number surface  410  in the numbered connector is at least one of a hollow and raised format. The number  510  on the number surface  502  can be made up of illuminated material, raised surface or carved on the surface. There may be one numbered surface or two numbered surface for each ring. The numbered surface  502  are fixed on the ring, they be made as an insertable tab or molded with the ring. The number surface may also allow other markings such as alphabets and raised surfaces for customization. The number surface in the numbered connector is at least one of a hollow and raised format. The number surface in the single numbered connector uses a single color or the number is in one color and the back ground is another color. 
       FIG. 6  shows the detailed view of the strip cap  102 . The strip cap  102  is multiples of the single cap that fit the tube  104  and seals it hermitically. The end  602  is extended out portion that enables the user to separate the strip cap  102  from the tube  104 . The sealer has three parts has an inner surface, outer edge ring and back support. The inner surface  604  for the sealer has a smooth surface; the outer edge ring  612  is an extension of the inner support ring  616  to close the tube, wherein the outer edge ring  612  is made up of soft material such as thermoplastic elastomers (material one). The back support  606  for the sealer is made up of a hard material so the rigidity of the cap is maintained. The flexible bridge at the lower portion  610  may be made up of the same material as the upper material or a softer material than the upper portion of the bridge. This would enable a person to cut the section from these parts and use the cap as individual caps for individual tubes such as PCR tubes, Q-PCR tubes, RT-PCR tubes, Eppendorf tubes and microcentrifuge tubes. Section  614  (bridge) and  608  as shown in the figures as part of the bridge shows they are important for structural integrity of the cap. The serrated part  608  may permit the user to cut through the serration so that they can use that as an individual cap. The bridge  614  shows it a continuous structure which has serrations on bridge  614 . This part of the cap is made up of hard material such as polypropylene. Another way to describe the ergonomic sealer is that it has an outer edge ring that is an extension of an inner support ring to close the tube, wherein the outer edge ring is made up of a soft material. 
       FIG. 7  shows the side view of the strip cap  102 . This figure describes another embodiment of the structure of the sealer. The sealer may be made up many layered ring structure such as  612 ,  712 ,  704  and the base  708 . They may be molded to be made from the same material having the same circumference to different circumferences. The may be made up of same soft material or may be a combination of soft and hard materials. For example,  162  part may the softest material and the  708  may the hardest material with  702  and  704  having a medium softness material in them. The purpose for varying the material softness is to allow the temperature driven experiments to complete without loss of samples. The flexibility of the lower softer material may help expand when it is hot but the rigidity of the base layer may allow sealing to be better. On the other hand if the cold storage would shrink the material then the gradient would help keep the seal quality intact due to expansion and contraction of the cap material. This is a technically superior design than existing technology as it requires precise calculations and correct material selection for blend and molding. The cap ends  710  and a projected lip  706  are designed to be ergonomically useful for user. They are made of the hard material polypropylene (material two) similar to what  608  is made up of. 
       FIG. 8  shows a top view of the strip cap  800 . It shows in detail the upper portion of the inner ring  802  recessed cap. The ridge  804  that surrounds and connects the recessed part to the upper ring  806 . The inner ring  802  is shown to have a shape. It could flat, concave or smooth. The cap having an inner ring  802  that is lower than an upper ring  806  and is made of an optically clear material. The strip cap may have several configurations. The strip cap may be a single cap, multiple strip caps such as 2, 4, 6, 8, 10, 12, 24, 36, 96 and 108 and 364 and may form a strip to accommodate these configurations. The strip cap may be individual strip cap or attached by the bridge to make a strip of caps for multiple configurations.  FIG. 9  shows a detailed view of the strip cap connector  900 . The details of the more enlarged picture have been discussed in the description of  FIG. 6 . 
       FIG. 10  shows the individual tube  102  with a single cap  202  that is made of soft material attached to a lid  1002 . Lid  1002  has an indented top as shown in  FIG. 8  ( 802 ,  804 ) with optically clear material for superior readings. The soft cap  202  is designed to fit to the opening  204  of the tube and seal it hermitically. A single numbered connector with its ring  1004  and with or without the bridge and a raised numbered surface may be used to label the tube for numerical recognition. The bridge might enable the user to add on more tubes by connecting the bridges that have snap on to slide addition ability. 
     The method of making the single or multiple tubes with cap and numbered connector bridge may be done using typical state-of-the-art manufacturing processes for two materials/two color molding is accomplished by plastic injection molding at approximately 220° C.-250° C. The first material, typically a rigid material such as polypropylene plastic pellets (material two) are fed into a hopper, melted within a heated screw of the Injection molding machine and injected into the mold/die. The first molded part is then moved over into a second injection mold and is typically over molded or co molded with the second material. After a cooling period, typically 10 to 20 seconds the co-molded part is ejected out of the mold and the process is repeated. 
     In addition, it will be appreciated that the various embodiments, materials, and designs can be interchangeable used in the current embodiments and various combinations of the article of use. Accordingly, the specification and drawings are to be regarded in an illustrative rather than a restrictive sense.