Abstract: At least one corrugated sheet is formed into a corrugated carton has a top panel, a bottom panel, opposite side walls, and opposite end walls. Intermittently spaced slits are formed through the corrugated sheet along fold lines defined between the top panel and the side walls and between the top panel and the end walls. Discrete openings are provided in the top panel to receive individual cans.

Abstract: A travel tray includes a flat support surface having a raised lip extending around its peripheral edge. A concave front wall is configured and dimensioned to accommodate the natural abdominal curvature of a user's torso. An aperture is formed in the support surface to receive a tapered beverage container of relatively large size. An adaptor is detachably secured to an annular raised lip that circumscribes the aperture. The adaptor reduces the diameter of the aperture so that it can accommodate a beverage container of smaller size. The adaptor ring is stored beneath the travel tray when not in use. The annular raised lip that circumscribes the aperture prevents spilled food or liquids from entering the aperture and spilling onto the user's lap. The raised lip that extends around the peripheral edge of the flat support surface provides the same function.

Abstract: A soldering station system for transporting, utilizing, and storing the unique tools required for soldering electrical wiring assemblies, printed circuit boards, and other small electronic sub-assemblies is provided. The soldering station system includes a tool case with a bottom portion, a plurality of side portions, and a top portion, a tool pallet assembly which is coupled to an interior surface of the tool case, the tool pallet has a plurality of interior recesses, and a plurality of tools adapted for working on electronic assemblies and positioned in the interior recesses of the tool pallet assembly.

Abstract: An arrangement for retaining a plurality of coins includes a main body portion constructed of a resilient material. The main body portion defines a coin receiving opening for at least partially receiving a plurality of coins. The opening has a length and width. The width has a variable dimension for frictioning receiving the plurality of coins. In a preferred embodiment, the main body portion partially defines a generally cylindrical channel.

Abstract: A needle sheathing safety device having a plurality of spaced openings for grasping and securely holding a hypodermic needle and cap. This invention features a container body housing; and a plurality of spaced apart and axially aligned openings for grasping and securely holding a needle cap and needle in the body housing. In most embodiments, the body housing is configured to position the user's hands free and clear of the needle during the sheathing and unsheathing operation.

Abstract: A sample container segment assembly for use in an automated, continuous, and random access analytical system is disclosed. The assembly includes a sample container which is received by a sample container segment, and the sample container segment is received on a carousel of the automated analytical instrument. The test sample container includes an upper skirt and a body having a reservoir for receipt of the test sample. The segment includes a base, a frame, and a handle. The frame has a shelf for which the upper skirt of the test sample container rests on, and has openings for receipt of the body of the sample container. The carousel has a carousel trough for receipt of the base of the sample container segment, and has a plurality of alignment pins disposed in the carousel trough. The base of the sample container segment has a circular slot and an elongated slot for receiving the alignment pins and positioning the sample container segment relative to the carousel.

Abstract: Resiliently expandable sleeves to locate and protectively separate from each other bottles or other articles placed vertically in a container are each comprised of at least three side walls connected to each other at their adjacent edges, each said side wall being tapered from the width at its upper edge to a lesser width at its lower end, the dimensions of the opening at the top of each said sleeve formed by said upper edges being designed to provide free entry of said article into said tapered sleeve, with further insertion of said article into said sleeve causing each of said side walls to be resiliently deflected outwardly, thereby to create a grasping pressure over the area of contact between the outer surface of said article, and the inner surface of each of said side walls.

Abstract: A sterilization mat has a mesh-like backing with opposite faces composed of intersecting stringers defining relatively large openings in the backing. The stringers have rounded or inclined surfaces at one face of the backing and a multiplicity of resilient pins or fingers project from those surfaces for supporting and fixating medical instruments. Preferably, rounded or inclined surfaces are also provided at the underside of the backing. During sterilization, the mat minimizes the accumulation of condensed moisture on and under the mat and promotes efficient sterilization of the instruments on the mat.

Abstract: An improved pipette tip support rack having a honeycomb structure. The rack includes an array of interconnected sleeves, each of the sleeves being constructed to support a pipette tip therein. The sleeves are connected by bridges which form along abutting, touching surfaces thereof, or which extend between non-touching sleeves. Openings are formed between adjacent ones of said sleeve which occupy substantially all of the space between adjacent sleeves not occupied by the bridges. Inwardly extending lips on the interior of each sleeve support the enlarged portion of the pipette tip and provide a channel through which the stem extends. Interior side walls of each sleeve provide lateral support to the pipette tips. The tray may be used in conjunction with a container to provide ventilation during autoclaving. The tray snaps into the container and rests on shoulders therein. A finger tab is provided for lifting the tray out of the container.

Abstract: A refill pack for storing and dispensing pipette tips into an empty tip rack. The refill rack comprises a hand-gripable carrier for an array of pipette tips releasably secured relative to the carrier such that after hand positioning the array of tips on the empty tip rack, the carrier may be released from the tips which are then free to be seated on a lower end of a pipette and removed from the tip rack.

Abstract: A plurality of ice cream cone nesting sites (14) are formed on the base wall (12,12') of a carrier (10,10'). Each nesting site is formed by a nesting wall configured as a truncated cone with its diameter decreasing as the distance from the base wall increases. The bottom wall is spaced above a supporting surface on which the carrier may be placed by feet (22,22') extending downwardly from the bottom wall to facilitate grasping and handling. A lip (28) may be formed around the outer perimeter of the bottom wall to provide spill containment and to enhance gripping of the carrier.

Abstract: A modified test tube is provided which can sit on any flat surface unaided by a test tube rack. The modified test tube includes a tubular containment portion and tubular neck portion. The containment portion has a bottom surface preferably provided with a plurality of legs and a closed end. The neck portion is angled approximately 45.degree. relative to the flattened surface and has a mouth which opens parallel to the flattened bottom surface. The legs enable the test tube to sit prone on any flat surface by itself, unaided by a rack, and the bent neck portion prevents the contents from spilling from the test tube. This design enables the contents within the test tube to be easily monitored without moving the test tube. A test tube rack is further provided for storing the test tubes. The test tube rack is generally a rectangular member having a plurality of cavities, spaced such that each does not intersect another.

Abstract: A multiple tier dessert container includes a container, a lid, a plurality of trays, and at least one handle. The container has a top surface, a bottom surface, a first end, a second end, a first side and a second side. The perimeter of the first end of the container is terminated with an angled edge of uniform thickness. The recessed cavity extends around the perimeter thereof, and is sized to be received by the angled edge of the container such that the lid snugly fits onto the container. The first side and second side have a plurality of ledges which are formed therein. Each tray has a length, a width and at least one area for storing decorated desserts. The size of the storage area is dictated by the size of decorated dessert. The width of each tray is sized to slidably fit in the container. The length of each tray is sized to firmly fit between an attached lid and the second end of the container.

Abstract: A meat product package for storing and displaying a plurality of tubular meat products preferably in an arcuate configuration, the package having a meat product forming section with plural arcuate recesses utilizing overformed recess edges to hold the tubular meat products in a curved position under tension within the recesses for storage and display. An alternative embodiment includes a method of arcuately shaping straight sticks of meat products cooked or smoked in a casing and placing them in a formed film pocket made on a form-fill-seal rollstock packaging machine.

Abstract: The present invention relates to a food storage device that is capable of storing food items for an extended period of time. This device includes a bottom wall that has a sidewall extending upward from its periphery forming a cavity therein. A removable platform is further contained within the cavity capable of supporting food items therein. The removable platform supported within the cavity by a support structure. The support structure embodied by either legs extending downward from the removable platform, pegs extending upward from the bottom wall or a ridge extending inwardly from the sidewall. The cavity is enclosed by a cover that is removably attached to the sidewall.

Abstract: A tray and process for hydrogen peroxide vapor sterilization of medical articles. The tray includes a bottom surface and side walls defining a space to receive articles to be sterilized. The bottom surface of the tray includes a number of inlet passages and wells with a known volume. In the process of the present invention, articles to be sterilized are placed in the tray, and aqueous solutions of hydrogen peroxide is delivered into the tray. When the excess hydrogen peroxide is drained through the inlet passages, a known volume of peroxide remains in the wells. Such remaining hydrogen peroxide is then vaporized to achieve sterilization.

Abstract: A meat product package for storing and displaying a plurality of tubular meat products, preferably in an arcuate configuration, having a meat product forming station with plural arcuate recesses utilizing overformed recess edges to hold the tubular meat products in a curved position within the recesses for storage and display.

Abstract: A portable paint shield that is attached to a paint can (60), having a unitary planar board (30) with a hole (40) in the center. The hole (40) is approximately the size of the circumference of the paint can (60). The unitary planar board (30) has a plurality of teeth-like protrusions (50) into the hole (40) to frictionally hold the board to the paint can (60). The device can be constructed from cardboard, corrugated paperboard and the like. The unitary planar board (30), when attached to a paint can (60) is conveniently placed and carried by the paint can (60). Thus providing a portable area of protection from paint drips, splatter, and access to the paint, in one motion.

Abstract: A multiple tier dessert container includes a container, a lid, a plurality of trays, and at least one handle. The container has a top surface, a bottom surface, a first end, a second end, a first side and a second side. The perimeter of the first end of the container is terminated with an angled edge of uniform thickness. The recessed cavity extends around the perimeter thereof, and is sized to be received by the angled edge of the container such that the lid snugly fits onto the container. The first side and second side have a plurality of ledges which are formed therein. Each tray has a length, a width and at least one area for storing decorated desserts. The size of the storage area is dictated by the size of decorated dessert. The width of each tray is sized to slidably fit in the container. The length of each tray is sized to firmly fit between an attached lid and the second end of the container.

Abstract: Wax candles are stored and transported in containers shaped similarly to the candles. The ambient temperature may cause the candles to partially or completely melt and hence lose their shape. When the ambient temperature eventually lowers, the candles will resolidify in the containers in their initial shape, and thus spoilage is prevented. A plurality of containers may be connected to form a candle storage tray, and several trays may be stacked atop one another in a storage container such as a basket.

Abstract: A flexible carrier tape for storage and delivery of components by an advancement mechanism, comprises a strip portion, a plurality of aligned pockets spaced along the strip portion for carrying the components, wherein each pocket includes a bottom wall, and a non-pressure sensitive adhesive comprising a thermoplastic elastomer block copolymer on the bottom wall of the pocket for retaining a component in the pocket.

Abstract: A pipette tip assembly is provided which includes one or more pipette tips, a tip support and a tip holder which is movable between a tip-holding and a tip-releasing position. The pipette tip assembly also includes a position-maintaining structure which is adapted to hold the tip holder in the tip-releasing position until the tip holder is selectively moved from that position. The position-maintaining structure thus eliminates or reduces the potential for inadvertent lifting of the tip holder relative to the assembly. The invention thus provides a pipette tip assembly that facilitates secure transport, minimal handling, and convenient and user-controlled operation.

Abstract: A refill pack for storing and dispensing pipette tips into an empty tip rack. The refill rack comprises a hand-gripable carrier for an array of pipette tips releasably secured relative to the carrier such that after hand positioning the array of tips on the empty tip rack, the carrier may be released from the tips which are then free to be seated on a lower end of a pipette and removed from the tip rack.

Abstract: A sample container segment assembly for use in an automated, continuous, and random access analytical system is disclosed. The assembly includes a sample container which is received by a sample container segment, and the sample container segment is received on a carousel of the automated analytical instrument. The test sample container includes an upper skirt and a body having a reservoir for receipt of the test sample. The segment includes a base, a frame, and a handle. The frame has a shelf for which the upper skirt of the test sample container rests on, and has openings for receipt of the body of the sample container. The carousel has a carousel trough for receipt of the base of the sample container segment, and has a plurality of alignment pins disposed in the carousel trough. The base of the sample container segment has a circular slot and an elongated slot for receiving the alignment pins and positioning the sample container segment relative to the carousel.

Abstract: A tray for housing semiconductor devices of a ball grid type, each having a surface provided with a plurality of wiring solder balls, the surface of each of the semiconductor devices having peripheral edges, and each of the wiring solder balls having a diameter, includes a tray surface, and pockets formed in the tray surface, each pocket having corners and a shape similar to and slightly larger than the surface of each semiconductor device. Each pocket has a bottom surface forming a depression and having a shape similar to and slightly smaller than the surface of each of the semiconductor devices and a depth larger than the diameter of each wiring solder ball. Each of ribs has a root formed on each corner of each pocket for dividing the pockets from each other and each having a width gradually increasing toward the bottom surface of each pocket.

Abstract: A carrier (8) is provided with one permanent tray member (30) and several tray inserts (40) and (41) that will hold vessels of different dimensions. The tray inserts (40) and (41) are placed on top of the permanent tray (30) and stay in place without movement. The carrier (8) has a solid bottom panel (10) with rigid sidewalls (20) that can be sterilized by gas, radiation, or cleaned with disinfectant. The carrier (8) can transport ice for cooling samples and/or an absorbent material for absorbing spills. The permanent tray (30) and tray inserts (40) and (41) preferably have a perforated hole design (37) throughout to conduct any spills quickly away from the user toward the bottom panel (10) of the carrier (8).

Abstract: A height extension for use on top of a crate having a wall structure which extends the height of the wall structure of the crate to more stably retain containers. The extension of the present invention can be used with nestable and stackable crates to increase the heights of the crates without expensive replacement of the crates. It is particularly well suited for use with crates holding taller or differently shaped bottles. The extension also does not interfere with the nesting and stacking capabilities of the crates so that handling is not effected in any way since crates equipped with extensions are compatible with existing crates.

Abstract: In order to be able to ship and, later, display a plurality of tools, each of which has a handle and a shaft, a foldable container formed of sheet material is disclosed which is defined by a plurality of walls, including at least a side wall and a top wall having a plurality of openings therein. The openings include a plurality of first openings each formed to receive the shaft of one of the tools and to support the tool with the handle positioned thereabove and including a plurality of second openings each formed to receive the handle of one of the tools and to support the tool with the shaft positioned thereabove. With these features of construction, the container further includes a display panel extending to a point above the top panel and, preferably, the container is a generally rectangular box, and the openings include holes and cutouts arranged in alternating fashion in at least two rows parallel to the display panel.

Abstract: A lap tray is disclosed for carrying food such as that available from a take-out or fast food restaurant. The lap tray has particular application for use by an individual wishing to consume the food carried on the tray while riding as a passenger in a motor vehicle that is subjected to the usual road turbulence. The lap tray includes a pair of food serving compartments, each of which is surrounded by a raised lip to prevent food carried thereon from falling off the tray. A raised annular rim surrounds a hole formed through the tray in which a drinking cup is received so as to retain the cup in an upright configuration and thereby prevent the cup from tipping and spilling its contents. A pair of legs depends from the tray at opposite sides thereof to extend downwardly along the legs of the user so as to stabilize the tray against lateral displacement when the user is seated and the tray is laid across the user's lap.

Abstract: A tray (10') for handling a semiconductor device encapsulated in a package body and having multiple electrical I/Os projecting from the package body has cell-to-cell interlocking capability as well as invertibility. An interlocking nest feature (16) is formed on the underside of the tray and interfaces with the cells (12') on the topside of the tray (10') when the trays are stacked. The interlocking nest feature has an external chamfer (20) which mates with a lead-in chamfer (18) of the tray cell to align the interlocking feature (16) and the cell (12'). The interlocking nest feature (16) has an internal device retaining chamfer (22) and a device capture surface (26) to guide and retain the semiconductor device when stacking trays, inverting trays or processing semiconductor devices with the trays inverted. In-tray inspection and electrical test are also possible using a test contactor having a functional equivalent of the interlocking nest feature.

Abstract: A pipette tip assembly is provided which includes one or more pipette tips, a tip support and a tip holder which is movable between a tip-holding and a tip-releasing position. Additionally, a pipette tip assembly is provided which includes one or more pipette tips and a tip holder which has tapered apertures therein. Methods of using such assemblies are further provided. The invention provides pipette tip assemblies that facilitate secure transport, minimal handling and convenient and user-controlled operation.

Abstract: A refill pack for storing and dispensing pipette tips into a tip rack, comprising a support plate with an array of holes containing disposable pipette tips arranged in an organized array and a carrier for hand positioning the support plate over the tip rack for release of the array of pipette tips into the tip rack.

Abstract: An organizer device for orthopedic equipment normally found in cast removal situations comprising a plastic box with a closed lower surface, an opened upper surface and a peripheral wall therearound, the box being vacuum formed with recesses and projections therein, a central recess having a semi-cylindrical end formed into one peripheral wall for the receipt of the cord of a saw, the central recess having a semi-cylindrical central extent extending to a central extent of the container, and the central recess having enlarged projections extending upwardly from the end of the recess remote from the end recess for supporting the head of a saw; and a plurality of supplemental recesses formed on opposite sides of the central recess.

Abstract: The multi-compartment tray exhibits a support and containment plane provided with a plurality of compartments, of which one compartment extends beneath the support and containment plane, thereby constituting a manual grip for the tray, while contemporaneously providing a suitable seating for a cup or can.

Abstract: An sterilization tray and mat used in combination for the sterilization of surgical instruments. The tray includes raised ribs protruding from the tray floor for supporting a sterilization mat above the tray floor and a plurality of holes for permitting the ingress and egress of sterilants and for permitting drainage of condensation. The mat includes a plurality of raised parallel ribs with rows of projections extending from and between each rib for supporting the instruments.

Abstract: A sample container holder is provided for gripping a sample container which contains a sample. The sample container holder comprises a body having a bore for receiving a sample container. A flexible element is disposed within the bore. A fluid passage is operatively connected with the flexible element for supplying a fluid to the flexible element such that, when the sample container is received in the bore in the body of the sample container holder, the flexible element engages the sample container with a conforming, cushioning compression of sufficient magnitude to resist removal of the container from the bore.

Abstract: An ophthalmic lens pallet having wells for receiving one or more lens containers at the receiving point achieves the requisite uniformity of motion in the direction of motion, and stability when transporting the lens in the orthogonal, non-translating directions by restraining the pallet between rails. A spring-loaded roller ball located on the side walls of the pallet body cooperate with guide rails on the conveyor to compress the spring-loaded roller ball when the pallet is between the guide rails. Blind holes on the pallet engage a drive which transports the pallet from the lens receiving point to an inspection station then to a lens disposition mechanism. The pallet wells comprise holes that pass through the pallet. These holes along with the rail and transport system make possible an arrangement of a lamp and camera for capturing an image of a lens.

Abstract: A pull out cup and can holder to receive and restrain a coffee cup or a beverage can at respective first and second openings formed through first and opposite ends of the holder. The cup and can holder is slidably received in and removable from a frame that is mounted below a suitable flat surface of a vehicle (e.g. a boat, and the like) that is subjected to turbulence and other mechanical forces during operation. The cup and can holder may be partially removed from the frame to expose either the first or second opening at the forward end thereof for receiving and restraining either a cup or a can. The cup and can holder may also be completely removed from the frame to be rotated by 180 degres and then returned to the frame so that the first or second opening may be relocated to the forward end whereby to receive and restrain the beverage container of the user's choice.

Abstract: A stacking and carrying device for spherical objects such as golf balls wherein a tray member supports the spherical objects in the form of a pyramid and has strap members for carrying the tray. A filling device is also provided which stacks the balls on the tray member in a pyramidal fashion automatically and without any orientation. The filling device and method disclosed afford use in an automated dispensing machine such as for use on a golf practice range.

Abstract: According to the present invention, there is provided a durable, lightweight disposable container containing a plurality of holders for holding blood product tubes. These tubes are firmly secured in each slot yet can be easily removed from the slot after filling. According to a preferred embodiment, the box can be fixed to a table top or other substantially flat surface in an area where the blood drawing procedure is to occur.

Abstract: A method of holding a container with a container holder comprises the following steps. The container is received within a bore on the container holder, and a fluid is conveyed through a fluid passage operatively connected with a flexible element within the bore such that the flexible element engages the container to retain the container within the bore.

Abstract: A pipette tip storage and dispensing system has a series of pipette tip holder cards each of which has a plurality of openings for holding a set of pipette tips extending partway through the openings in an upright orientation. The openings in each card match those in the other cards, and cards loaded with pipette tips can be stacked vertically with the pipette tips in one card extending into the open upper ends of the tips in the next adjacent card of the stack, to minimize storage space. An alignment device is arranged to hold the pipette tips in a card in a vertical orientation as the card is removed from the top of the stack and transferred to a pipette tip holder tray so that the pipette tips can be lowered into aligned openings in the holder tray with the card resting on the top wall of the tray.

Abstract: This transformer comprises a tank containing insulating liquid and an amorphous alloy core within the liquid comprising spaced-apart upper and lower yokes and two spaced-apart legs at opposite ends of the yokes. Coil structure surrounds the legs, locating the yokes outside the coil structure and locating the legs within two windows of the coil structure. A box-like enclosure primarily of electrical insulating material encloses the lower yoke and is positioned to capture therein chips of amorphous alloy that might become detached from the core and fall toward the bottom of the tank.A first portion of the box-like enclosure extends between the two windows of the coil structure and is held against the bottom of the coil structure. This first portion includes flaps that are folded upwardly into the two coil windows to form liners for these windows, but still leaving clearance space within the windows around the core legs through which detached chips may fall past the liners into the box portion of the enclosure.

Abstract: A container for holding a plurality of disposable pipette tips which are to be installed to a pipette rack for a pipetting apparatus is disclosed. The container includes an upper panel having a plurality of aligned openings into which the disposable tips are to be inserted, respectively, and a lower panel for regulating swing movement of the respective disposable tips held by the upper panel. The lower panel is separated from the upper panel so as to be freely movable between a first position at which the lower panel is spaced from the upper panel and a second position at which the lower panel is close to the upper panel. The container further includes four tabs which support the lower panel thereon at the first position. The tabs are formed on side panels which are connected to the upper panel. According to the container, it is possible to install the container which holes the pipette tips to the pipette rack without applying any specific force.

Abstract: The communion device includes a tray having a central opening for receiving a removable container and a plurality of bread receiving openings surrounding the central opening for receiving a plurality of pieces of bread, each of which is wrapped in a removable wrapper. The container is located in the central opening for receiving the wrappers after they have been removed from the bread for disposal purposes.

Abstract: A holder is pneumatically actuated to grasp and hold a plurality of sample containers during an analytical process which requires movement of the containers. The holder comprises a body having holes therein for receiving the caps and upper portions of the containers. Within each hole is a rigid cylindrical element and within each rigid element is a flexible tubular element. The outer diameter of the flexible element is smaller than the inner diameter of the rigid element so that a pneumatically sealed chamber is formed between the two elements when the ends of the flexible element are folded back over the ends and outer surface of the rigid element. The holder body and the rigid element are provided with holes forming a fluid passage through which positive and negative pressures may be applied to the chamber. When a negative pressure is applied to the chamber to draw the flexible element outward toward the rigid element, the cap and upper portion may move freely into the flexible element.

Abstract: To permit reuse of shipping boxes and shipping holders for elongated artis having a transverse flange, particularly automotive-type halogen lamps, a stackable carrier plate (1) is formed with article receptors (2) which each include an engagement surface (4) which is tilted by an acuate angle (.alpha.) of, for example, about 13.degree. with respect to the major plane of the plate. The engagement surface is apertured so that the articles can hang at the receptors, with the flange engaging the engagement surface, the angle being selected to place the elongated portion (3b, 3e) of the articles below the plate between the elongated portion (3d) of the article which is above the engagement surface of a lower plate (1') in the stack.

Abstract: The two communion devices for wine and bread each include a tray having a central opening for receiving a removable container and a plurality of cup receiving openings surrounding the central opening for receiving a plurality of cups. The container is located in the central opening for receiving the cups after they have been used. Each cup has an upper open end and a handle. In the embodiment for taking wine, or a suitable liquid, the cup receiving openings are formed in the top wall and the cups have lids. In the embodiment for taking bread, the cup receiving openings are formed in the side walls of the device leading to a cup receiving chamber or cavities with a bread receiving chamber located above the cup receiving chamber or cavities separated by an intermediate wall. Pairs of aligned openings are formed through the top wall and through the intermediate wall whereby a punch may be inserted through the aligned openings to sever and force the bread into the cups below the bread.

Abstract: A pipette tip for use in automated assay testing systems includes an annular, protruding seal ring on the interior wall of the pipette for engaging a sealing surface on a probe to provide a resilient seal. The pipette tip also includes a positive stop for assuring proper positioning and alignment of the pipette tip on the probe for facilitating mounting of the pipette tip on the probe while minimizing variation in the loading and unloading forces required. Locator surfaces are provided on the exterior of the pipette tip for precisely aligning the pipette tip in the system rack for positioning the pipette tip relative to the probe.

Abstract: A dental tray for counting, storing, shipping and dispensing cartridges that includes a plurality of integrally formed wells for securely holding and sealing a dental cartridge which are placed horizontally within the wells in a manner whereby the discharge nozzle of the cartridge is positioned so that it abuts a portion of the well for sealing it from contamination and which the tray may be formed of opaque or color material which will block curing rays when light activated material is placed within the dental cartridges. Each cartridge is individually retained within its respective well by a snap or friction fit. A sliding or rotating cover is provided which is spaced slightly above the cartridges so as to prevent unintentional dislodgement of the cartridge from its well or seat.