CA2181296A1 - Planter mulching cover - Google Patents
Planter mulching coverInfo
- Publication number
- CA2181296A1 CA2181296A1 CA 2181296 CA2181296A CA2181296A1 CA 2181296 A1 CA2181296 A1 CA 2181296A1 CA 2181296 CA2181296 CA 2181296 CA 2181296 A CA2181296 A CA 2181296A CA 2181296 A1 CA2181296 A1 CA 2181296A1
- Authority
- CA
- Canada
- Prior art keywords
- planter
- cover
- diaphragm
- edge
- mulching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0281—Protective ground coverings for individual plants, e.g. for plants in pots
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
- Protection Of Plants (AREA)
Abstract
A mulching cover for a planter is formed from an iris-type diaphragm that is circumscribed by a coaxial collar for mounting the diaphragm to the planter. The diaphragm defines a central hole through which a plant stem may pass. The diaphragm and the coaxial collar together define a substantially radial breach which permits the collar and the diaphragm to be opened and closed. The plant stem is inserted through the breach in the open collar and fed into the central hole. The cover is rolled tighter until it is of the same radius as the planter and is then inserted into and secured to the planter.
Description
218129~
Planter Mulching Cover by Mike Scholtens Field of Invention This invention relates to a device for discouraging weeds from growing in a planter. More specifically, it relates to a mulching cover for blocking light from re~ching inside the planter.
~a~kground 10 Controlling weeds is a diff1cult but i~ oll~ll task for growing plants. Nursery companies in particular consume large amounts of labour and toxic chemicals to discourage weeds from growing in their planters. Mulching is an advantageous ~ltern~tive to manual weeding or chemical poisoning.
Mulching is the process of laying a bedding of opaque materi~l over the soil surrounding a plant to block out the light that weeds need for photosynthesis. Traditional mulching mat~ri~l~ such as straw, wood chips and peat moss also help plants by causing the surrounding soil to retain moisture and heat.
However, traditional mulch is too easily displaced by erosion or ~nim~
As an ~lternative to natural mulches, opaque synthetic coverings have been used with some success. At 20 the simplest level, the weekend gardener has for years laid garbage bags over a soil bed, slit holes in the bags, covered the bags with a thin layer of soil as an anchor and a disguise, and planted flowers through Page I of 13 '~ 2181296 the slits. However, this tedious process is only applopl;ate for relatively small private gardens; the process and the results are ~ln~ti~f~rtQry for the commercial nurseryman. Over time the thin plastic tears and shifts; it begins to look ratty and allows light to pass through to the weeds below. These problems are exacerbated when trying to protect planters as opposed to garden beds. Many individual little pieces of plastic must be cut to the size and shape of the desired planters. The small pieces of plastic must be carefully hidden under soil to prevent them from blowing and corners are likely to creep above the soil ruining the ~peal~ce of the planter. The buried plastic is also likely to interfere with the proper flow of air and water which can be so difficult to achieve in planters.
10 Many prefabricated commercial mulch collars have been created to overcome some of the disadvantages of garbage bags. Examples of such mulch collars are taught in United States Patent number 5,058,317 granted to Lawrence J. McMurtrey on October 22, 1991 for a "Mulch Collar" and United States Patent number 5,085,001 granted to Michael S. Crawley on February 4, 1992 for a "Stabilized Mulch Skirt". Commercial mulch collars typically comprise a woven sheet of opaque m~teri~l having a central aperture. A radial slot connects the central aperture to the outside perimeter of the sheet. In operation, the user opens the slot and draws it around the plant stem until the stem is encircled by the central aperture. The user then closes up the slot and stakes the collar to the ground.
Commercial mulching collars are clearly an improvement over makeshift plastic garbage bags. They 20 are easier to use in volume, they stay in place when staked, and they are less likely to rip because the slot and aperture are prefabricated into the weaving instead of being mere tears. However, these collars Page20fl3 ~ 2181296 are poorly suited for use in a planter. The first problem is that lightweight sheets of such small size are prone to change position or blow away unless securely staked; however, inserting multiple stakes into a pot is labour intensive and may damage a plant's sensitive root system. Small stakes are also liable to injure people, to fall out of the planter, and to become lost. The second problem is that such covers make watering the complete soil area difficult unless the cover is removed during watering or the central a~cllulc is of such a large diameter that it permits light to pass through to weeds below. The third problem is that a cover resting on soil might encourage the growth of mould by sealing in moisture and restricting air flow.
10 Covers for planters do exist; however, they are designed for other purposes and therefore suffer certain disadvantages when used for mulching. For example, United States Patent number 4,995,192 granted to Richard DeWild for a "Soil Cover for Potted or In-Ground Plants" and United States Patent Number 5,184,421 granted to Stephen W. Meharg on February 9, 1993 for a "Locking Cover for Pots" teach covers that are designed to keep the soil from spilling out of the planter and to keep children and ~nim~l~ out of the soil. Typically, these sorts of covers comprise a barrier that covers the planter opening to retain the soil, a mec.h~ni~m for securing the cover to the planter, and a relatively large central aperture in the barrier through which the plant stem passes. Because the cover is made of a plastic rigid enough to restrain soil and ~nim~l~, the central aperture must be large enough that the cover doesn't damage delicate plant stems. In order to encourage proper ventilation and watering 20 throughout the planter, supplement~ry holes are often distributed through the cover.
Page30fl3 ~ 2181296 What is needed is a mulching cover adapted specifically for a planter. The mulching cover should block light from ent~ring the planter without unduly restricting air and water flow. It should adapt to multiple planter sizes and to plants having multiple stems.
Summary The present invention is directed to such a device. According to one aspect of the invention, there is provided a mulching cover for a planter, the planter having a rim that defines an aperture through which a plant may grow, comprising: an iris-type diaphragm adapted to cover a first region of the planter ap~ c, thereby casting a first projection in the plane of the aperture, a collar, eng~ging a portion of 10 the perimeter of the diaphragm, adapted to cover a second region of the planter apcl ~UlC, thereby casting a second projection in the plane of the aperture, and means for securing the collar to the planter.
The first projection and the second projection may form a union that substantially equals the whole of the planter aperture. The diaphragm may be opaque and made of resilient plastic. The securing means may be a groove circumscribing the collar and adapted to engage the rim of the planter. The iris-type diaphragm may comprise a plurality of leaves exten-ling radially inward from the collar and the leaves may be carved from a unitary sheet of plastic.
Each of the leaves may comprise: a tip, a first edge, a second edge obliquely opposing the first edge 20 and meeting the first edge at the tip, and third edge obliquely opposing the first edge and the second edge and eng~gin~ the collar. Each leaf tip may be rounded. Each pair of adjacent leaves may define a Page 4 0f l3 l~ 2181296 slot between the first edge of the first leaf and the second edge of the second leaf and the slot may extend radially from the first leafs tip toward its third edge. In some cases, the slot may intersect the third edge. The collar and the diaphragm may define a substantially radial breach. The leaves may be free to move normally to the plane defined by the diaphragm.
According to a second aspect of the invention, there is provide a method of providing mulching for a planter, the planter having a rim that defines an aperture through which a plant may grow, comprising:
covering a first region of the planter aperture with an iris-type diaphragm, covering a second region of the planter a~ lule with a collar that engages a portion of the perimeter of the diaphragm, and securing 10 the collar to the planter.
Brief Des~ ;l,tion of the D. a~
These and other real~es, aspects, and advantages of the present invention will become better understood with reference to the following description, appended claims, and accolllp~lying drawings where:
Figure 1 is a perspective top view of a planter mulching cover unrolled into its fully open position and embodying one aspect of thè invention, Figure 2 is a perspective top view of the planter mulching cover of Figure 1 in an intermediate position, and 20 Figure 3 is a perspective top view of the planter mulching cover of Figure 1 rolled-up into its fully closed position Page S of 13 Des~ ;I,tion With reference now to Figure 1, a planter mulching cover is generally illustrated at 100. The cover 100 is adjacent a planter 200, not part of the invention, that defines an apc~ e 210 circumscribed by a rim 220. A plant 300, not part of the invention, having a stem 310 grows within the planter 200 cxtçntling through the aperture 210.
The mulching cover 100 comprises an iris-type diaphragm generally illustrated at 120 and a mounting meçh~ni~m generally illustrated at 160.
The iris-type diaphragm 120 comprises a plurality of leaves 122 extending radially inward from a circumscribing collar 124. The leaves 122 are preferably carved from a unitary sheet of plastic and the plastic is preferably very soft, thin, resilient, and opaque. Opacity is desired to block light from passing through the aperture 210 of the planter 200. Resiliency is desired to permit the leaves 122 to engage in the relative movement typical of an iris-type diaphragm. Softness and thinness are desired so that the delicate plant stem 210 is less likely to be injured by the diaphragm leaves 122. The collar 124 is preferably made from resilient plastic to permit the leaves 122 to engage in the relative movement typical of an iris-type diaphragm.
20 Each leaf 122 has a tip 126, a first edge 128, a second edge 130 obliquely opposing the first edge 128 and meeting the first edge 128 at the tip 126, and third edge 132 obliquely opposing the first edge 128 Page 6 of 13 and the second edge 130 and eng~ging the collar 124. Each tip 126 is rounded as further protection for the plant stem 210.
For each pair of adjacent leaves 122 a slot 134 is defined between the first edge 128 of the first leaf 122 and the second edge 130 of the second leaf 122. Each slot 134 extends generally radially from the leafs 122 tip 126 toward its third edge 132. The slot 134 need not extend fully to intersect the third edge 132, ext~n~ing only so far as required to facilitate the desired relative movement typical of an iris-type diaphragm; however, a bre~ in~ slot 134a extends past the third edge 132 of each adjacent leaf 122 to breach the collar 124, thereby permitting the collar 124 and therefore the diaphragm 120 to 10 be opened and closed.
With reference now to Figures 1, 2 and 3, the configuration of the diaphragm 120 is more clearly illustrated as the cover 100 is rolled-up and unrolled at the bre~ ing slot 134a. When the cover 100 is at least partially unrolled (Figures 1,2), the diaphragm 120 is open and the leaf 122 tips 126 define bet~veen them a central a~ u,e 136. The size of the central aperture 136 can be calibrated to the radius of the collar 124 and thereby the planter 200 to take advantage of the as~ ion that a larger planter 200 will often contain a larger plant 300. As the cover 100 is rolled-up and the radius of the collar 124 is reduced, the leaves 122 are forced together, thereby narrowing the slots 134, (Figure 2) until the first edge 128 of one leaf 122 begins to overlaps the second edge 130 of an adjacent leaf 122, 20 thereby narrowing the slots 134. When the radius of the collar 124 is sufficiently reduced (Figure 3), the central aperture 136 is completely closed and the slots 134 are completely closed as well. The fully Page 7 0f l3 closed cover 100 is advantageously used for storing unco"l~."i~te~ soil in planters in prepaldlion for planting.
It must be emphasized that the iris-type diaphragm 120 differs from a conventional camera diaphragm in one very important respect. Unlike a camera diaphragm, the leaves 122 are free to move normally to the diaphragm 120 plane. As the leaves 122 are forced to move away from the diaphragm 120 plane, the radius of the central apel lule 136 increases. As the leaves 122 resiliently move toward the diaphragm 120 plane, the radius of the central aperture 136 decreases.
10 The mounting mech~ni~m 160 comprises a circumscribing groove 162 which follows the perimeter of the collar 124 and is adapted to engage the rim 210 of the planter 200. However, other methods of mounting the diaphragm 120 to the planter 200 are suitable and contemplated. For example, the diaphragm 120 could be press fit into the planter 200. The diaphragm 120 could be chemically bonded to the planter 200. The diaphragm 120 and the planter 200 could even be formed as an integral whole.
It should be observed in the l,lef~l,ed embodiment illustrated that the diaphragm 120 is both concave and recessed below the rim 210 of the planter 200. This configuration is advantageous in that it permits a nurseryman to simultaneously carry a number of planters 200 by their rims 210 without having to first remove the mulching covers 100.
Page 8 of 13 In operation, the user unrolls the collar 124 of the mulching cover 100, thereby forcing open the breaçhing slot 134a. The user feeds the breaçhing slot 134a around and over the stem 310 of the plant 300 until the stem 310 is positioned in the central aperture 136. He then rolls-up the collar 124, thereby closing the diaphragm 120 around the stem 310, and seals the mulching cover 100 over the aperture 210 of the planter 200 by eng~gin~ the rim 220 of the planter 200 with the groove 162 of the cover 100.
Rolling the cover 100 to fit the planter 200 is likely to set the correct size range for the ~t;lLule 136 to fit the plant stem 310 because larger planters 200 are generally used to hold larger plants 300.
However, a fine adjustment of the aperture 136 to fit the plant stem 310 is made by moving the 10 diaphragm 120 leaves 122 toward or away from the diaphragm plane. When in place, the cover 100 restricts light from cnt~ring the a~el~ule 210 ofthe planter 200 but does not unduly interfere with air flow or watering because the slots 134 allow both air and water to pass through.
When the diaphragm 120 leaves 122 smoothly engage the stem 310 of the plant 300, they encourage the stem 310 toward the centre of the planter 200. As the plant 300 grows, the stem 310 presses against the diaphragm 120 leaves 122 to expand the central aperture 136 as needed. It should be observed that plants having multiple stems can be more easily accommodated by this iris-type diaphragm 120 structure than by a rigid cover with a fixed central aperture. For a conventional rigid cover to accommodate multiple stems with room for growth, the central aperture would have to be made so 20 large that it could not effectively block out light or encourage the stems toward the center of the planter 200.
Page 9 of 13 It should be observed that the mulching cover 100, while flexible, can be m~nllf~ctured to be durable as well such that it can be reused with successive plants and planters.
Although a specific embodiment of the present invention has been described and illustrated, the present invention is not limited to the features of this embodiment, but includes all variations and modifications within the scope of the claims.
For example, it is contemplated that the slots can have both a radial and a tangential component.
It is also contemplated that the perimeter of the collar 124 need not define a circle. The circular geometry is preferable because it allows a single cover 100 to fit dirrclcnt planter sizes; however, it would also be possible to build a non-circular cover 100 that would fit a single size of planter.
It is also contemplated that the diaphragm 120 need not cover the whole planter aperture 210, but merely a specific region. It is also contemplated that one cover 100 could contain a plurality of diaphragms 120.
Although the bre~rl~ing slot 134a aids the user to insert the stem 310 into the diaphragm 120, it is 20 contemplated that the bre~ ing slot 134a could be omitted for use with smaller plants 300 where the stem 310 would be directly inserted into the central aperture 136 ofthe diaphragm 120.
Page 10 of 13
Planter Mulching Cover by Mike Scholtens Field of Invention This invention relates to a device for discouraging weeds from growing in a planter. More specifically, it relates to a mulching cover for blocking light from re~ching inside the planter.
~a~kground 10 Controlling weeds is a diff1cult but i~ oll~ll task for growing plants. Nursery companies in particular consume large amounts of labour and toxic chemicals to discourage weeds from growing in their planters. Mulching is an advantageous ~ltern~tive to manual weeding or chemical poisoning.
Mulching is the process of laying a bedding of opaque materi~l over the soil surrounding a plant to block out the light that weeds need for photosynthesis. Traditional mulching mat~ri~l~ such as straw, wood chips and peat moss also help plants by causing the surrounding soil to retain moisture and heat.
However, traditional mulch is too easily displaced by erosion or ~nim~
As an ~lternative to natural mulches, opaque synthetic coverings have been used with some success. At 20 the simplest level, the weekend gardener has for years laid garbage bags over a soil bed, slit holes in the bags, covered the bags with a thin layer of soil as an anchor and a disguise, and planted flowers through Page I of 13 '~ 2181296 the slits. However, this tedious process is only applopl;ate for relatively small private gardens; the process and the results are ~ln~ti~f~rtQry for the commercial nurseryman. Over time the thin plastic tears and shifts; it begins to look ratty and allows light to pass through to the weeds below. These problems are exacerbated when trying to protect planters as opposed to garden beds. Many individual little pieces of plastic must be cut to the size and shape of the desired planters. The small pieces of plastic must be carefully hidden under soil to prevent them from blowing and corners are likely to creep above the soil ruining the ~peal~ce of the planter. The buried plastic is also likely to interfere with the proper flow of air and water which can be so difficult to achieve in planters.
10 Many prefabricated commercial mulch collars have been created to overcome some of the disadvantages of garbage bags. Examples of such mulch collars are taught in United States Patent number 5,058,317 granted to Lawrence J. McMurtrey on October 22, 1991 for a "Mulch Collar" and United States Patent number 5,085,001 granted to Michael S. Crawley on February 4, 1992 for a "Stabilized Mulch Skirt". Commercial mulch collars typically comprise a woven sheet of opaque m~teri~l having a central aperture. A radial slot connects the central aperture to the outside perimeter of the sheet. In operation, the user opens the slot and draws it around the plant stem until the stem is encircled by the central aperture. The user then closes up the slot and stakes the collar to the ground.
Commercial mulching collars are clearly an improvement over makeshift plastic garbage bags. They 20 are easier to use in volume, they stay in place when staked, and they are less likely to rip because the slot and aperture are prefabricated into the weaving instead of being mere tears. However, these collars Page20fl3 ~ 2181296 are poorly suited for use in a planter. The first problem is that lightweight sheets of such small size are prone to change position or blow away unless securely staked; however, inserting multiple stakes into a pot is labour intensive and may damage a plant's sensitive root system. Small stakes are also liable to injure people, to fall out of the planter, and to become lost. The second problem is that such covers make watering the complete soil area difficult unless the cover is removed during watering or the central a~cllulc is of such a large diameter that it permits light to pass through to weeds below. The third problem is that a cover resting on soil might encourage the growth of mould by sealing in moisture and restricting air flow.
10 Covers for planters do exist; however, they are designed for other purposes and therefore suffer certain disadvantages when used for mulching. For example, United States Patent number 4,995,192 granted to Richard DeWild for a "Soil Cover for Potted or In-Ground Plants" and United States Patent Number 5,184,421 granted to Stephen W. Meharg on February 9, 1993 for a "Locking Cover for Pots" teach covers that are designed to keep the soil from spilling out of the planter and to keep children and ~nim~l~ out of the soil. Typically, these sorts of covers comprise a barrier that covers the planter opening to retain the soil, a mec.h~ni~m for securing the cover to the planter, and a relatively large central aperture in the barrier through which the plant stem passes. Because the cover is made of a plastic rigid enough to restrain soil and ~nim~l~, the central aperture must be large enough that the cover doesn't damage delicate plant stems. In order to encourage proper ventilation and watering 20 throughout the planter, supplement~ry holes are often distributed through the cover.
Page30fl3 ~ 2181296 What is needed is a mulching cover adapted specifically for a planter. The mulching cover should block light from ent~ring the planter without unduly restricting air and water flow. It should adapt to multiple planter sizes and to plants having multiple stems.
Summary The present invention is directed to such a device. According to one aspect of the invention, there is provided a mulching cover for a planter, the planter having a rim that defines an aperture through which a plant may grow, comprising: an iris-type diaphragm adapted to cover a first region of the planter ap~ c, thereby casting a first projection in the plane of the aperture, a collar, eng~ging a portion of 10 the perimeter of the diaphragm, adapted to cover a second region of the planter apcl ~UlC, thereby casting a second projection in the plane of the aperture, and means for securing the collar to the planter.
The first projection and the second projection may form a union that substantially equals the whole of the planter aperture. The diaphragm may be opaque and made of resilient plastic. The securing means may be a groove circumscribing the collar and adapted to engage the rim of the planter. The iris-type diaphragm may comprise a plurality of leaves exten-ling radially inward from the collar and the leaves may be carved from a unitary sheet of plastic.
Each of the leaves may comprise: a tip, a first edge, a second edge obliquely opposing the first edge 20 and meeting the first edge at the tip, and third edge obliquely opposing the first edge and the second edge and eng~gin~ the collar. Each leaf tip may be rounded. Each pair of adjacent leaves may define a Page 4 0f l3 l~ 2181296 slot between the first edge of the first leaf and the second edge of the second leaf and the slot may extend radially from the first leafs tip toward its third edge. In some cases, the slot may intersect the third edge. The collar and the diaphragm may define a substantially radial breach. The leaves may be free to move normally to the plane defined by the diaphragm.
According to a second aspect of the invention, there is provide a method of providing mulching for a planter, the planter having a rim that defines an aperture through which a plant may grow, comprising:
covering a first region of the planter aperture with an iris-type diaphragm, covering a second region of the planter a~ lule with a collar that engages a portion of the perimeter of the diaphragm, and securing 10 the collar to the planter.
Brief Des~ ;l,tion of the D. a~
These and other real~es, aspects, and advantages of the present invention will become better understood with reference to the following description, appended claims, and accolllp~lying drawings where:
Figure 1 is a perspective top view of a planter mulching cover unrolled into its fully open position and embodying one aspect of thè invention, Figure 2 is a perspective top view of the planter mulching cover of Figure 1 in an intermediate position, and 20 Figure 3 is a perspective top view of the planter mulching cover of Figure 1 rolled-up into its fully closed position Page S of 13 Des~ ;I,tion With reference now to Figure 1, a planter mulching cover is generally illustrated at 100. The cover 100 is adjacent a planter 200, not part of the invention, that defines an apc~ e 210 circumscribed by a rim 220. A plant 300, not part of the invention, having a stem 310 grows within the planter 200 cxtçntling through the aperture 210.
The mulching cover 100 comprises an iris-type diaphragm generally illustrated at 120 and a mounting meçh~ni~m generally illustrated at 160.
The iris-type diaphragm 120 comprises a plurality of leaves 122 extending radially inward from a circumscribing collar 124. The leaves 122 are preferably carved from a unitary sheet of plastic and the plastic is preferably very soft, thin, resilient, and opaque. Opacity is desired to block light from passing through the aperture 210 of the planter 200. Resiliency is desired to permit the leaves 122 to engage in the relative movement typical of an iris-type diaphragm. Softness and thinness are desired so that the delicate plant stem 210 is less likely to be injured by the diaphragm leaves 122. The collar 124 is preferably made from resilient plastic to permit the leaves 122 to engage in the relative movement typical of an iris-type diaphragm.
20 Each leaf 122 has a tip 126, a first edge 128, a second edge 130 obliquely opposing the first edge 128 and meeting the first edge 128 at the tip 126, and third edge 132 obliquely opposing the first edge 128 Page 6 of 13 and the second edge 130 and eng~ging the collar 124. Each tip 126 is rounded as further protection for the plant stem 210.
For each pair of adjacent leaves 122 a slot 134 is defined between the first edge 128 of the first leaf 122 and the second edge 130 of the second leaf 122. Each slot 134 extends generally radially from the leafs 122 tip 126 toward its third edge 132. The slot 134 need not extend fully to intersect the third edge 132, ext~n~ing only so far as required to facilitate the desired relative movement typical of an iris-type diaphragm; however, a bre~ in~ slot 134a extends past the third edge 132 of each adjacent leaf 122 to breach the collar 124, thereby permitting the collar 124 and therefore the diaphragm 120 to 10 be opened and closed.
With reference now to Figures 1, 2 and 3, the configuration of the diaphragm 120 is more clearly illustrated as the cover 100 is rolled-up and unrolled at the bre~ ing slot 134a. When the cover 100 is at least partially unrolled (Figures 1,2), the diaphragm 120 is open and the leaf 122 tips 126 define bet~veen them a central a~ u,e 136. The size of the central aperture 136 can be calibrated to the radius of the collar 124 and thereby the planter 200 to take advantage of the as~ ion that a larger planter 200 will often contain a larger plant 300. As the cover 100 is rolled-up and the radius of the collar 124 is reduced, the leaves 122 are forced together, thereby narrowing the slots 134, (Figure 2) until the first edge 128 of one leaf 122 begins to overlaps the second edge 130 of an adjacent leaf 122, 20 thereby narrowing the slots 134. When the radius of the collar 124 is sufficiently reduced (Figure 3), the central aperture 136 is completely closed and the slots 134 are completely closed as well. The fully Page 7 0f l3 closed cover 100 is advantageously used for storing unco"l~."i~te~ soil in planters in prepaldlion for planting.
It must be emphasized that the iris-type diaphragm 120 differs from a conventional camera diaphragm in one very important respect. Unlike a camera diaphragm, the leaves 122 are free to move normally to the diaphragm 120 plane. As the leaves 122 are forced to move away from the diaphragm 120 plane, the radius of the central apel lule 136 increases. As the leaves 122 resiliently move toward the diaphragm 120 plane, the radius of the central aperture 136 decreases.
10 The mounting mech~ni~m 160 comprises a circumscribing groove 162 which follows the perimeter of the collar 124 and is adapted to engage the rim 210 of the planter 200. However, other methods of mounting the diaphragm 120 to the planter 200 are suitable and contemplated. For example, the diaphragm 120 could be press fit into the planter 200. The diaphragm 120 could be chemically bonded to the planter 200. The diaphragm 120 and the planter 200 could even be formed as an integral whole.
It should be observed in the l,lef~l,ed embodiment illustrated that the diaphragm 120 is both concave and recessed below the rim 210 of the planter 200. This configuration is advantageous in that it permits a nurseryman to simultaneously carry a number of planters 200 by their rims 210 without having to first remove the mulching covers 100.
Page 8 of 13 In operation, the user unrolls the collar 124 of the mulching cover 100, thereby forcing open the breaçhing slot 134a. The user feeds the breaçhing slot 134a around and over the stem 310 of the plant 300 until the stem 310 is positioned in the central aperture 136. He then rolls-up the collar 124, thereby closing the diaphragm 120 around the stem 310, and seals the mulching cover 100 over the aperture 210 of the planter 200 by eng~gin~ the rim 220 of the planter 200 with the groove 162 of the cover 100.
Rolling the cover 100 to fit the planter 200 is likely to set the correct size range for the ~t;lLule 136 to fit the plant stem 310 because larger planters 200 are generally used to hold larger plants 300.
However, a fine adjustment of the aperture 136 to fit the plant stem 310 is made by moving the 10 diaphragm 120 leaves 122 toward or away from the diaphragm plane. When in place, the cover 100 restricts light from cnt~ring the a~el~ule 210 ofthe planter 200 but does not unduly interfere with air flow or watering because the slots 134 allow both air and water to pass through.
When the diaphragm 120 leaves 122 smoothly engage the stem 310 of the plant 300, they encourage the stem 310 toward the centre of the planter 200. As the plant 300 grows, the stem 310 presses against the diaphragm 120 leaves 122 to expand the central aperture 136 as needed. It should be observed that plants having multiple stems can be more easily accommodated by this iris-type diaphragm 120 structure than by a rigid cover with a fixed central aperture. For a conventional rigid cover to accommodate multiple stems with room for growth, the central aperture would have to be made so 20 large that it could not effectively block out light or encourage the stems toward the center of the planter 200.
Page 9 of 13 It should be observed that the mulching cover 100, while flexible, can be m~nllf~ctured to be durable as well such that it can be reused with successive plants and planters.
Although a specific embodiment of the present invention has been described and illustrated, the present invention is not limited to the features of this embodiment, but includes all variations and modifications within the scope of the claims.
For example, it is contemplated that the slots can have both a radial and a tangential component.
It is also contemplated that the perimeter of the collar 124 need not define a circle. The circular geometry is preferable because it allows a single cover 100 to fit dirrclcnt planter sizes; however, it would also be possible to build a non-circular cover 100 that would fit a single size of planter.
It is also contemplated that the diaphragm 120 need not cover the whole planter aperture 210, but merely a specific region. It is also contemplated that one cover 100 could contain a plurality of diaphragms 120.
Although the bre~rl~ing slot 134a aids the user to insert the stem 310 into the diaphragm 120, it is 20 contemplated that the bre~ ing slot 134a could be omitted for use with smaller plants 300 where the stem 310 would be directly inserted into the central aperture 136 ofthe diaphragm 120.
Page 10 of 13
Claims (15)
1. A mulching cover for a planter, the planter having a rim that defines an aperture through which a plant may grow, comprising:
(a) an iris-type diaphragm adapted to cover a first region of the planter aperture, thereby casting a first projection in the plane of the aperture, (b) a collar, engaging a portion of the perimeter of the diaphragm, adapted to cover a second region of the planter aperture, thereby casting a second projection in the plane of the aperture, and (c) means for securing the collar to the planter.
(a) an iris-type diaphragm adapted to cover a first region of the planter aperture, thereby casting a first projection in the plane of the aperture, (b) a collar, engaging a portion of the perimeter of the diaphragm, adapted to cover a second region of the planter aperture, thereby casting a second projection in the plane of the aperture, and (c) means for securing the collar to the planter.
2. A mulching cover as in Claim 1, wherein the first projection and the second projection form a union that substantially equals the whole of the planter aperture.
3. A mulching cover as in Claim 2, wherein said diaphragm is opaque.
4. A mulching cover as in Claim 3, wherein said diaphragm is made of resilient plastic.
5. A mulching cover as in Claim 4 wherein the securing means is a groove circumscribing said collar and adapted to engage the rim of the planter.
6. A mulching cover as in Claim 5 wherein said iris-type diaphragm comprises a plurality of leaves extending radially inward from the collar.
7. A mulching cover as in Claim 6, wherein said leaves are carved from a unitary sheet of plastic.
8. A mulching cover as in Claim 7, wherein each of said leaves comprises:
Page 11 of 13 (a) a tip, (b) a first edge, (c) a second edge obliquely opposing the first edge and meeting the first edge at the tip, (d) and third edge obliquely opposing the first edge and the second edge and engaging the collar.
Page 11 of 13 (a) a tip, (b) a first edge, (c) a second edge obliquely opposing the first edge and meeting the first edge at the tip, (d) and third edge obliquely opposing the first edge and the second edge and engaging the collar.
9. A mulching cover as in Claim 8 wherein each tip is rounded.
10. A mulching cover as in Claim 9 wherein each pair of adjacent leaves defines a slot between the first edge of the first leaf and the second edge of the second leaf.
11. A mulching cover as in Claim 10 wherein the slot extends radially from the first leafs tip toward its third edge.
12. A mulching cover as in Claim 11 wherein the slot intersects the third edge.
13. A mulching cover as in Claim 12 wherein the leaves are free to move normally to the plane defined by the diaphragm.
14. A mulching cover as in Claim 14, wherein said collar and said diaphragm define a substantially radial breach.
15. A method of providing mulching for a planter, the planter having a rim that defines an aperture through which a plant may grow, comprising:
(a) covering a first region of the planter aperture with an iris-type diaphragm, (b) covering a second region of the planter aperture with a collar that engages a portion of the perimeter of the diaphragm, and (c) securing the collar to the planter.
(a) covering a first region of the planter aperture with an iris-type diaphragm, (b) covering a second region of the planter aperture with a collar that engages a portion of the perimeter of the diaphragm, and (c) securing the collar to the planter.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2181296 CA2181296A1 (en) | 1996-07-16 | 1996-07-16 | Planter mulching cover |
| AU35342/97A AU713110B2 (en) | 1996-07-16 | 1997-07-16 | Planter mulching cover |
| PCT/CA1997/000513 WO1998002032A1 (en) | 1996-07-16 | 1997-07-16 | Planter mulching cover |
| NZ333640A NZ333640A (en) | 1996-07-16 | 1997-07-16 | Mulching cover for planter with a split diaphragm within a collar |
| EP97931600A EP0923282A1 (en) | 1996-07-16 | 1997-07-16 | Planter mulching cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2181296 CA2181296A1 (en) | 1996-07-16 | 1996-07-16 | Planter mulching cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2181296A1 true CA2181296A1 (en) | 1998-01-17 |
Family
ID=4158621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2181296 Abandoned CA2181296A1 (en) | 1996-07-16 | 1996-07-16 | Planter mulching cover |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0923282A1 (en) |
| AU (1) | AU713110B2 (en) |
| CA (1) | CA2181296A1 (en) |
| NZ (1) | NZ333640A (en) |
| WO (1) | WO1998002032A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10517241B1 (en) * | 2013-03-16 | 2019-12-31 | Phenoselex, Inc. | Plant collars |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2206220A1 (en) * | 1997-05-27 | 1998-11-27 | Michael Scholtens | Nursery pot mulching collar |
| AUPP698598A0 (en) * | 1998-11-06 | 1998-12-03 | Matthews, Philip Lindsay | Plant container |
| GB2406255B (en) * | 2003-09-26 | 2006-01-04 | Geraldine Mc Donal | Plant container |
| FR3012724B1 (en) * | 2013-11-07 | 2016-08-05 | Lucien Fevriero | WATER RESERVE MULCHING FOR PLANT CULTIVATION, IN PARTICULAR PLANTS CULTIVATED IN POTS. |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2146516A5 (en) * | 1971-07-16 | 1973-03-02 | Lefeuvre Albert | |
| US3961443A (en) * | 1975-05-05 | 1976-06-08 | Insalaco Charles J | Cover for nursery pots providing improved protection, support and feeding |
| US4995192A (en) * | 1989-11-27 | 1991-02-26 | Dewid Richard | Soil cover for potted or in-ground plants |
| US5184421A (en) * | 1989-11-30 | 1993-02-09 | Meharg Stephen W | Locking cover for pots |
| US4977703A (en) * | 1990-01-30 | 1990-12-18 | Chris Blanc | Plant soil protector |
| US5058317A (en) * | 1990-05-01 | 1991-10-22 | Mcmurtrey Lawrence J | Mulch Collar |
| US5085001A (en) * | 1990-05-14 | 1992-02-04 | Crawley Michael S | Stabilized mulch skirt |
| US5502921A (en) * | 1995-02-03 | 1996-04-02 | Hyslop; William P. | Mowing guard |
-
1996
- 1996-07-16 CA CA 2181296 patent/CA2181296A1/en not_active Abandoned
-
1997
- 1997-07-16 EP EP97931600A patent/EP0923282A1/en not_active Withdrawn
- 1997-07-16 WO PCT/CA1997/000513 patent/WO1998002032A1/en not_active Application Discontinuation
- 1997-07-16 NZ NZ333640A patent/NZ333640A/en unknown
- 1997-07-16 AU AU35342/97A patent/AU713110B2/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10517241B1 (en) * | 2013-03-16 | 2019-12-31 | Phenoselex, Inc. | Plant collars |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0923282A1 (en) | 1999-06-23 |
| WO1998002032A1 (en) | 1998-01-22 |
| NZ333640A (en) | 2001-02-23 |
| AU713110B2 (en) | 1999-11-25 |
| AU3534297A (en) | 1998-02-09 |
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Legal Events
| Date | Code | Title | Description |
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| FZDE | Dead |