Abstract: An improved slide fastener for coupling garment portions together. The slide fastener construction including extending parallel tines designed for preventing the garment or parts of the garment or threads therein from jamming the slider as the slider is moved along for fastening or unfastening the garment.

Abstract: A slide-fastener stringer half has an elongated warp-knitted tape having a pair of opposite faces and a pair of opposite longitudinally extending edges. The tape is knit with a plurality of chained warp yarns each forming a respective longitudinally extending loop chain or pillar defining a respective longitudinally extending wale, a first weft filament laid into and extending over two of the chains at one of the edges of the tape, a group of second weft yarns lapped into the chains across the full width of the tape, and a group of third weft yarns laid into all of the chains except that chain immediately at the one edge. A continuous mono-filamentary coupling element having a succession of turns is secured to one face of the tape along the one edge by stitching which overlies the turns, extends through the tape, and has a needle thread on the other face of the tape between two of the chains at the one edge.

Abstract: Corduroy cutting machine having a knife shaft whereon a plurality of circular knives are mounted adjacent one another, and a table cooperating with the knife shaft and having a table edge over which, during operation of the machine, fabric formed with loops that are to be cut open by the circular knives is drawn, the improvement therein includes means at the table for adjusting and resetting the edge line of the table to a bending of the knife shaft that is dependent upon the operating condition of the machine.

Abstract: Improved machine and method for longitudinal compressive treatment of webs employing a two roll drive nip. Specially arranged initial parts of one or a pair of stationary retarding members are positioned at the exit side of the drive nip in the region of minor divergence of the roll surfaces to provide damming forces. The initial part of the retarding member, preferably a curved, resilient nipping element, is shaped to oppose the flow of the web. By its construction and position close to the line of centers of the rolls, it establishes a very compacted column extending upstream to an initial treatment point continually located in the drive nip, between the moving surfaces of the rolls. In this region, longitudinal compressive action occurs upon the web in a continuous and uniform manner, preferably with compensatory action in response to variations in the forces exerted by the compacted column of web.

Abstract: An apparatus for treating a tow of filaments with a fluid, the apparatus forming a tow path therethrough and having a pair of guide surfaces positioned on opposite sides of the tow in series with each other in such a manner that the two path has at least two bends. Fluid nozzles associated with each of the guide surfaces are positioned in such a manner that fluid from these nozzles flows in layers along the guide surfaces and passes through the tow at the bends in the two path. This apparatus is capable of treating a tow under little or no tension, so that it can be used to anneal and shrink tows of certain filaments. The moving fluid advances the tow through the apparatus.

Abstract: An annularly segmented generally cylindrical pick-up container is disclosed for use in combination with bounce crimping apparatus which texturizes a multi-filament yarn of synthetic resinous material. The container includes a plurality of annular baffles which divide the container into a corresponding plurality of substantially annular chambers. The container is rotated while a texturized multi-filament yarn of synthetic resinous material is deposited into the annular chambers. As one chamber becomes full, the rotational axis of the container is moved to a new position so that the texturized material will begin filling the next radially outwardly adjacent annular chamber.

Abstract: The magnet carrier assembly of an electrographic copying device is fabricated from a number of separate parts instead of being machined from a single block of metal. The assembly can consist of a tubular body which supports the magnets either on the outside, or inside, peripheral surface. The tubular body can be formed by extrusion integrally with a radial spider connected to a hub which supports the body. In another form the carrier can be built up by combining specially profiled sheet metal strips with other axially extending elements with which they are joined in a tongue-in-groove arrangement.

Abstract: A check valve comprises a housing defining a valve seat thereon and a valve member reciprocally mounted in the housing to normally engage the seat for blocking fluid flow therepast. Two pairs of split retaining members are mounted in axially spaced relationship on a stem of the valve member and are expanded axially thereon by a compression coil spring for biasing the valve member to its closed position. A stop member is secured on an end of the stem of the valve member to prevent movement of one pair of the retaining members therepast. A slot is formed axially through the stop member and extends partially in the stem of the valve member to expose an end of the spring. In assembling the valve, a tool is inserted into the slot to compress the spring whereby the one pair of retaining members may be mounted on the valve member, between the spring and the stop member.

Abstract: A C-shaped or ring-shaped collar member having a groove along the inner periphery of one end in combination with an adjustable pin insert for engaging the end of a torsion spring threaded on a cone. Apertures are provided in the collar for accepting a winding bar to rotate the collar.

Abstract: Method and apparatus for constructing a plurality of large diameter storage tanks of strip material. A continuous strip is fed to a support assembly at a single building site which supports the strip for production of a large diameter storage tank structure. The storage tank structure includes a plurality of helical convolutions extending upwardly, with the edge portions of adjacent convolutions secured together. The storage tank structure is severed along a horizontal plane above the support assembly. The portion of the severed tank structure above the severing plane is transported from the building site to a use site remote therefrom through use of a lifting collar removably positioned below the top of the transported tank structure. The above steps are continued to complete the production of one or more additional storage tanks.

Abstract: An apparatus for simultaneously forming a plurality of terminals from a plurality of lengths of wire and inserting the terminals simultaneously into preformed openings in a plastic part. The apparatus includes a mechanism for simultaneously moving a plurality of lengths of wire which are held in spaced relation to one another to a severing position. The wires may be arranged in both horizontal and vertical planes. At the severing position, a shear is provided for simultaneously severing end portions from the lengths of wires to form a plurality of short wire terminals. The shears and an anvil support the terminals and maintain them in spaced relation to one another after severing for insertion into the preformed openings in the plastic part. The apparatus further includes a tool which supports the plastic part. A slide moves the plastic part and the terminals into engagement with one another to thereby embed the terminals in the preformed openings of the plastic part.

Abstract: An apparatus and method for inserting solder preforms on selected circuit board back plane pins. A template, drilled with a pattern of holes corresponding to the pattern of back plane pins and counterbored in hole positions corresponding to back plane pins which are to receive solder preforms, is positioned at an acute angle and vibrated at low frequency. Solder preforms are placed at the upper end of the template and due to the vibration and angle the template is positioned at, slide down the surface of the template and are trapped in the counterbored holes. The preform loaded side of the template is aligned with the circuit board back plane and the two are clamped together, causing the selected back plane pins to pass through the corresponding solder preforms positioned in the template's counterbored holes. The clamping circuit board and template are rotated so the template is positioned above the circuit board.

Abstract: A method of making electrical devices, and the electrical devices made thereby, comprising the steps of: stamping from a sheet of metal a pattern of conductors configured to connect circuit components together in a relationship which forms a useful product, such as a watch, with the terminals of each of said circuit components being adjacent and connectable to appropriate terminating means formed in said pattern of conductors when said circuit components have predetermined positions adjacent said pattern of conductors; encapsulating said pattern of conductors with plastic having cavities and apertures formed therein, the cavities each having a configuration and a location to receive one of said circuit components therein in said predetermined positions and with said terminating means extending into said cavities to terminate the terminals of said circuit components; forming at least some of said component terminals on the surface of said components in positions to bend over the terminating means when the comp

Abstract: A method of contacting metallic contact areas located on semiconductor bodies comprises passing wires through capillary openings into contact with the connecting contacts and fixing them thereto, severing the wires at predetermined distance from the contact areas and bending the separated wires to enable them to be connected to further connecting parts.The invention also includes a device suitable for carrying out this method.

Abstract: Coil winding apparatus includes wire tap pulling needles with the needles for pulling taps on each side of the bobbin mounted on separate mounting plates with a quick change cam mechanism and springs for spacing the plates and thus the needles to accommodate coil bobbins of different sizes with terminals at different spacings. The apparatus also includes wire feed means for clamping the wire between the winding flyers and the wire supply rolls to advance the wire at a rate greater than required by the flyer to make a winding to provide slack in the wire just prior to retraction of the tap pull needles so that the wire does not break or stretch during the tap pulling sequence.

Abstract: A tool for cutting electrical cable of the welded type, the tool including a circular saw blade, means for holding the cable armor against the blade, means for adjusting and limiting the penetration of the blade into the armor, and means for rotating the saw blade combined with means to propel the tool along the cable whereby the tool makes a longitudinal cut through the armor, of any desired length.

Abstract: A manually held and manipulated knife for trimming a comestible product such as meat having a frame or frame assembly including a hand grasp or handle part extending radially outwardly from a ring-like part of short axial length and of considerable greater diameter than its axial length, a power driven ring-like blade also of short axial length rotatably supported in the ring-like part of the handle and having a radially inwardly facing circular cutting edge at one axial end, and a ring-like depth of cut control or gauge member within the blade and connected to the frame assembly for adjustment lengthwise of the axis of the blade by screws located radially outwardly of the gauge member. Clearance is provided between the blade and the depth of cut control or gauge member which clearance increases in the direction away from the cutting edge of the blade. The part of the depth of cut control or gauge member spaced from its connection to the frame assembly is flexible.

Abstract: An adapter for use attached to a chain saw for trimming hedges and cutting brush which includes a mounting member adapted to be fixedly secured to a chain saw guide or blade by mounting in the normally available bolt holes at the forward and rearward sections of the guide, the adapter further including a plurality of dividers forming a plurality of dividing channels therebetween in which the individual sticks or hedge members are gathered and compressed for cutting, the dividing channels being formed by dividing surfaces on the adjacent sides of said dividers to facilitate grouping of the hedges, the dividers further including a gathering surface positioned adjacent a stopping surface which is formed by the mounting member such that the gathering surface and the stopping surface are at an acute angle with respect to one another of preferably less than 90.degree.

Abstract: An anchoring screw for dental fillings has a head with two indented crowns separated by a narrow neck, and a tapered shank with a thread of saw-tooth profile. Actuation of the screw by a tubular spanner or socket can be achieved with the spanner or socket inclined by up to 40.degree. to the screw axis.

Abstract: A cord clamp of integrally molded plastic construction particularly useful for adjustably securing a straightedge mounting cord to a drafting board. The clamp includes two mating, but not identical halves integrally hinged together like the halves of a clam shell. One of the halves of the clamp is adapted to be mounted on a drafting board or other support and may be considered as the mounting half. The other half is the one that swings open and closed and may be considered as the closing half. The mating surfaces of the two halves are interrupted by offset recesses which cooperate to define a labyrinth passageway capable of retaining a cord therein and clamping it between the two halves. A user may readily remove the cord from the clamp or adjust its position therein by manually opening the clamp without using tools and thus exposing the cord.

Abstract: A test indicator comprising a holder to which is pivoted a measuring arm with a measuring tip; a casing equipped with a means for magnifying the displacement of said measuring tip; and an intermediate shaft which moves axially in response to pivoted displacement of the measuring tip, thereby transmitting pivotal displacement of the tip to the magnifying means, the holder being fitted to the casing for 360.degree. rotation around the intermediate shaft so that the plane of pivotal movement of the measuring tip can be changed.

Abstract: A tool calibration system including a tool calibration fixture and a tool height and offset calibration insert for calibrating the position of a tool bit in a micromachining tool system. The tool calibration fixture comprises a yokelike structure having a triangular head, a cavity in the triangular head, and a port which communicates a side of the triangular head with the cavity. Yoke arms integral with the triangular head extend along each side of a tool bar and a tool head of the micromachining tool system. The yoke arms are secured to the tool bar to place the cavity around a tool bit which may be mounted to the end of the tool head. Three linear variable differential transformer's (LVDT) are adjustably mounted in the triangular head along an X axis, a Y axis, and a Z axis. The calibration insert comprises a main base which can be mounted in the tool head of the micromachining tool system in place of a tool holder and a reference projection extending from a front surface of the main base.

Abstract: In archery bow sights having spaced apart front and rear sighting elements provided with rigid attachment to the bow and extending either forwardly or rearwardly from the bow riser section rapid, easily-made fine adjustments about the vertical and lateral axes of the bow, and basic rough general technique adjustments about the vertical, lateral (two adjustments of differing sensitivity provided) and longitudinal axes are provided, in addition to a multiple-sighting line hunting sight having the same structure for the basic rough and fine adjustments.

Abstract: A one-piece carriage is proportioned for sliding engagement with an elongated guide which mounts an elongated micrometer screw laterally thereof and parallel thereto. An integral, lateral extension of the carriage overlies the screw and is provided with a slot perpendicular to the screw, the slot freely receiving the latch portion of a lever which is secured pivotally in the slot by a pivot pin disposed parallel to the screw. The outer portion of the lever forms a lever actuator for engagement with the screw, a spring interengaging the lever and carriage for urging the latch portion resiliently into engagement with the screw. The carriage also supports a block which mounts an archery bow sight.

Abstract: Two rectangular housings are mounted in a pair of spaced recesses in a garage floor to have cover means thereon moved to closed positions flush with the floor surface. Mounted in one end of each housing beneath a first cover is a rotatable wheel-supporting pad, which is slidable longitudinally of the housing, and is reciprocable vertically by a pneumatically operated scissors jack. Each housing has pivoted on its opposite end a second cover which carries on its inside surface a laser, a mirror, and a conventional alignment chart for denoting toe in, toe out, camber, etc., all of which items are disposed within one section of the housing when the pivotal cover is closed. When the pivotal covers are swung to upright positions, each laser directs a beam of light upwardly onto the associated mirror, which is inclined at 45.degree. to the vertical, so that the mirrors direct their beams horizontally through an aperture in the center of the associated chart and coaxially toward one another.

Abstract: A ternary intermetallic compound capable of reversible sorption of hydrogen having the chemical formula LaNi.sub.5-x Al.sub.x, where x is in the range of about 0.01 to 1.5 and the method of storing hydrogen using the intermetallic compound.

Abstract: A method of drying processed polyethylene coated photographic paper in an enclosed drying chamber through which the exposed and processed polyethylene coated photographic paper bearing an image on one side of its sides is made to travel.This comprises directing radiant heat onto the non-image bearing side only of the paper as it travels through the drying chamber and as a stream of air flows over the image bearing side of the photographic paper.The advantage of this invention over drying apparatus at present commercially available is that less heat energy is required to dry large photographic sheets.

Abstract: An improvement in the method of grain drying wherein grain is dried in a first drying bin and removed to a holding bin, the improvement comprising withdrawing hot air from the holding bin and circulating the hot air to the drying bin.

Abstract: An improved mechanical stoppering apparatus is provided by the present invention for use with a chamber freeze dryer in which at least two shelves supporting a plurality of receptacles containing material to be freeze dried are adjustably suspended from a fixed plate one above the other for substantially isolating the shelves from the walls of the vacuum chamber of the freeze dryer to provide an even rate of sublimation along the entire surface area of the shelves. A drive means is provided for raising the lower shelf individually until the receptacles it supports contact the bottom of the upper shelf, whereupon both shelves move upwardly in tandem toward the fixed plate, the receptacles on the upper shelf being stoppered against the fixed plate and the receptacles on the lower shelf being stoppered against the bottom of the upper plate.

Abstract: Treatment of articles in an enclosure traversed by gases, according to which the articles are advanced translationally and are simultaneously rotated, characterized by apparatus for causing the articles to travel the length of the enclosure several times and at different levels, and for causing the articles to roll on flat superimposed surfaces extending across the enclosure by bringing them in contact with driving components carried in a continuous or endless circuit so that the same components provide for successive travel of the articles first in one direction, and then in the other direction at two different levels.

Abstract: A teaching aid for accounting comprising a flat rectangular bookkeeping entry guide bearing accounting indicia. A plurality of chips are provided, shaped to fit into recesses in the entry guide. A plurality of account cards are also provided, along with labels for each card. The account cards also have recesses shaped to receive the entry chips.

Abstract: An educational time-space clock having an oval dial provided with astronomical information; and indicating hands which rotate counterclockwise in proper sequence; as well as the current hour and minute or second indicating hands which also rotate counterclockwise with respect to calibrations of minutes, and hours in Roman numerals, arranged on the dial for counterclockwise reading. An earth hand carries a representation of the earth having an orbiting small ball corresponding to the moon. The second earth hand bears a legend of the speed of light. The hour hand simulates a rocket in flight, and an alarm-timesetting hand is in the form of a lightning bolt. A calendar display and a historical data display are also provided on the front of the clock.

Abstract: The boot has closing flaps and a fastening. The fastening includes a first tension member guided alternately between the closing flaps by guides, to cover an insertion opening in the upper part of the boot located in the vicinity of the instep, as well as a tightening fastener connected to the end of the first tension member. The tightening fastener includes a tightening lever located on one closing flap and a fastening clip on the other closing flap. The clip is connected to the first tension member. The tightening lever is connected to one end of a second tension member also guided alternately between the closing flaps by guides.

Abstract: A crane-excavator or the like has a boom, a saddle, a translatable stick and a digging implement. A stick cylinder and implement cylinder are provided. The ends of the stick and implement cylinder rams are connected to common lever arms which are pivoted to the stick on a transverse axis which is offset from the ram-lever connections and form the stick center line. The lever arms are connected to the digging implement in a manner so that the combined forces from both rams are transmitted to the implement to pivot the latter about its axis. The simultaneous movement of the stick cylinder ram and the implement cylinder ram causes the stick to extend or retract, thus causing a shift of the implement-stick pivot axis relative to the saddle. The implement may be raised or lowered even when the stick ram is fixed in length.

Abstract: The relative movement between the draft frame and the bowl member of a scraper bowl-lift apparatus is controlled by one or more bowl-lift motors. The longitudinal centerline of the motor passes through a spreader member of the draft frame. One end of the motor is pivotally connected to a shrouded motor support at a location above the spreader member while the other end of the motor is pivotally connected to a preselected portion of the bowl member. By so orienting the bowl-lift motor relative to the spreader, the entire draft frame apparatus is of improved strength and efficiency.

Abstract: A self-locking baggage tag assembly formed from a single continuous sheet of material including a portion printed for entry of passenger identification information. The assembly is constructed such that the tag may be inserted through a handle of a piece of baggage, folded over the handle and mechanically interlocked such that the passenger identification information is concealed from plain view. The tag assembly includes a detachable claim check. Printed on the exterior portions of the tag assembly are airline, flight and destination information.

Abstract: An improved permanent calendar assembly adapted and structured to display any month of any year. As in known calendars of this type, the construction features a flat main body with forwardly protruding tracks for removable mating with date columns. For flexibility of display blocks or end pieces carrying dates "29", "30" and "31" are rotatably or removably mounted onto the date columns. The date mounting structure allows both sides of the blocks to be shown, one side carrying a date and the reverse side being blank.

Abstract: A mobile radiotelephone station set base is provided with a pushbutton dialing pad in a first face and has a rectangular card-receiving slot in an adjacent face and opening into a card-receiving pocket extending into the base parallel to the first face. A flexible rectangular card for inscribing frequently used numbers is provided and suitably dimensioned so that when the card is in the base slot and pocket it is deformed for frictionally engaging the pocket walls. This engagement holds the card at any manually selectable degree of penetration into the pocket and such penetration is selected by a user so that a desired number inscribed on the card is indexed at the slot adjacent to the pushbutton dialing pad.

Abstract: Indicators for cartridge magazines to inform the user if a magazine is empty; if it contains one cartridge; or if it is full. Acoustic means are disclosed by which the condition of the magazine can be determined. Also disclosed is a full-magazine indicator comprising a magazine floor which can be appreciably deformed by means within the magazine, when the magazine is full.

Abstract: An automatic and semiautomatic small caliber conversion system for automatic or semiautomatic shotguns and rifles such as, for example, M-16 and AR-16 rifles, including a uniquely designed three element structure and associated ammunition feeding means to permit the use of smaller caliber, inexpensive ammunition in rifles and shotguns designed originally for larger caliber ammunition. The system includes a bolt/receiver assembly which easily replaces the bolt carrier of the, for example, M-16 rifle, and a magazine assembly which can be inserted by hand into any standard, for example, 0.223 round M-16 magazine. The bolt/receiver assembly is made up of three sub-assemblies, a receiver, a bolt, and a recoil spring. The receiver sub-assembly includes a section of a circle with a short barrel section in the front which fits into the M-16 chambers, a receiver lug at top rear to locate it within the M-16 chamber and prevent its rotary or linear motions and a guide rail.

Abstract: A fishing rod holder and hook setting device embodies a fishing rod holder tube mounted for vertical swinging rotation on a support housing adapted to be ground anchored in a fixed position. A ratchet wheel mounted for rotation within the support housing is interconnected with the holder tube by clock springs which, when under tension, tend to rotate the holder tube upwardly toward a vertical position. Catch members adapted for selective engagement with the ratchet wheel are provided to selectively apply a desired tension to the springs by repeated oscillatory rotation of the holder tube. A friction latch releasably retains the holder tube in a downward, relatively horizontal position, against the action of the clock springs.

Abstract: A fishing rod holder is provided which may be driven into the ground, and which includes a tubular portion for receiving the handle of a fishing rod and for supporting the rod at a desired angle so that it extends out over the body of water from which fish are to be extracted. The tubular portion includes a slot at its upper end through which the reel of the fishing line extends. An electrical indicator unit, which may include a buzzer, a light, or other electrically energized indicator, is mounted on the side of the tubular portion near its upper end. The electrical indicator unit is self-contained in a separate case, and it includes the usual batteries and electrically energized indicator. The unit also includes a spring-loaded energized trigger which extends into the tubular portion of the holder through the aforesaid slot. The handle of the fishing rod normally rests against the trigger without sufficient force to cause it to energize the electric indicator.

Abstract: Wraps to hold line guides on a flexible fisherman's rod are formed as sleeve-like units of a resilient polymer material which exhibits the characteristic properties of being capable of being elastically stretched, fixed in its stretched state by lowering the temperature thereof below normal room temperature whereby the elasticity is lost, and subsequently returned towards its original unstretched state by being allowed to warm towards normal room temperature such that the elasticity thereof is regained. The sleeve-like wrap is radially expanded and elastically stretched so as to increase its inside diameter to a diameter greater than the diameter of the rod. While in an expanded state, the temperature of the rod wrap is lowered sufficiently to cause the rod wrap to lose its elasticity and remain in a fixed and expanded state. The rod wrap is then placed about the fishing rod and over at least a portion of the line guide or other rod implement to be attached to the rod.

Abstract: A fishing lure adapted for trolling in waters being fished and comprising an elongated section of concavo-convex curvature in a longitudinal plane and having laterally extending flute sections of concavo-convex curvature in transverse planes generally perpendicular to the longitudinal plane of the lure and having line- and hook-fastening openings positioned to provide optional spinning or wobbler action of the lure in the water.

Abstract: A fishing lure having a spoon-shaped blade with a first attachment location for a fishing line and a second attachment location spaced from the first location includes an offset tail in the form of an elongated stiff member having a first end firmly attached to the blade at the second attachment location and a second end carrying a loosely attached hook. The stiff member extends away from the blade in a direction such that the center of gravity of the member is offset with respect to an extension of a line between the first attachment point and the second attachment point. The offset tail causes the lure to trail through the water in a sinuous path with realistic short side-to-side darting motions. The stiff member may be made of wire, with beads of brass, or other material heavier than water, strung along the wire, preferably in order of increasing size from the first end to the second end.

Abstract: A disposable mousetrap comprises an elongated plastic housing having an air-tight swinging door biased toward its closed condition by a rubber band. An articulated arm extends from the door to the floor of the housing and then to a detent located near the rear of the interior of the housing. A trigger for disengaging the arm from the detent is secured to the arm at the end of the arm which is remote from the door. This structure, and particularly the articulated arm, allows all of the parts of the trap except for the rubber band to be injection molded as a unit.

Abstract: Structures which have a wide variety of applications including that of educational toys are formed of chains of hinged three-dimensional units such as tetrahedra. The chains may be formed by folding a sheet of material.

Abstract: An inflation device adapted to admit compressed gas to the interior of a balloon, and to seal that interior against the atmosphere after inflation, is comprised of a pair of circular disks in parallel alignment and spaced from each other. The disks are rigidly affixed to a central shank which extends beyond one of them. The shank extension is bored with a passage, sealed at the far end thereof, in communication with the annular space between the disks by means of a radial orifice. The tubular neck of the balloon is stretched over the sealing disks, with the shank extension protruding from the opening of the balloon sheath. Upon pressurizing the passage in the shank with air, or other inflating medium, that portion of the balloon stretched between the two disks distends and permits the inflating medium to enter the internal volume of the gasbag around the periphery of the inner disk.

Abstract: This amusement device includes a suspended flexible track attached to a support at one end, and a motor driven device slidingly mounted to the track in guided relation. A control system is provided which includes a pair of elongate clutch elements wrapped around the motor shaft in opposite directions, the elements being operatively connected to the support at one end and to a control bar at the other end which is manipulated to provide speed and direction control. The track system includes dual, lengthwise extending track elements connected to the support to permit rotational movement of the track and the motor driven unit in a plane transverse to the direction of travel. A flywheel is mounted to the motor shaft by means of a resilient connection to provide the device with controlled gyroscopic action.

Abstract: A plant potting system providing a pot to facilitate rapid and safe transplants of plants to a layer pot. The system includes a pot and liner rotatable with respect to each other, both the pot and liner have apertures formed therein in opposition when the pot and liner are in one position, and in alignment when they are in a second position rotated with respect to the first position to permit the plant roots to extend therethrough.