# US 4,392,328 A · Cellular moist film plant culture system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,392,328 A - Document ID: US4392328A - Status: Granted - Kind: A - Application number: 06/280,358 - Filed: 1981-07-06 - Granted: 1983-07-12 - Earliest claimed: 1981-07-06 - Inventors: Fred L. Walker - Web page: https://patentgrep.com/patent/US4392328A ## CPC - A01G 31/02: Special apparatus therefor (self-acting watering devices A01G27/00) - A01G 31/06: Hydroponic culture on racks or in stacked containers - Y02P 60/21: Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures - A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12) - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract An improved system for growing plants is provided which includes an envelope having a closable seam along at least one edge and having sheets of porous flexible material which carry a number of dry nutrient packs supported within the envelope. Plants may be inserted at intervals along the open seam and the seam partly closed by clamping means around the stems of each of the plants. In one embodiment of the invention a vertical configuration is employed while in other embodiments, a horizontal configuration is employed. ## Claims ### Claim 1 A moist film plant culture system for growing plants comprising: impermeable envelope having top and side wall means confining an air space in which roots of plants can grow, said envelope means having a seam along at least one edge thereof, support means for supporting the root ball of a plant within said air space, a first water absorbent matting material of high capillarity fastened within the envelope and a second water absorbent matting material of high capillarity surrounding the root ball, the surrounded root ball and expanding root system and the growing plant structure being supported on said first matting material within said air space, said envelope being two ply with one ply including a flexible moisture impermeable outer sheet and a second ply including said first matting material, said envelope further including a plurality of stiff cross ribs to maintain the walls and top means of the envelope in an elevated position to maintain said interior air space when the seam is closed, said flexible envelope being collapsible for shipping the culture system, a dry chemical nutrient packet, said packet being formed by a third water absorbent matting material enclosing a dry chemical nutrient, said nutrient pack being in contact with said first water absorbent material and spaced from the root ball, a nutrient transfer means for transferring nutrient from said packet to said plant structure, said transfer means including said matting materials, whereby when said water absorbent materials are wet, dissolved chemicals are leached from said nutrient packet and will migrate from the chemical packet to the root ball and to all root bearing surfaces, means for closing the seam of said envelope around the individual stems of a plurality of plants whereby the root balls and growing roots of said plants are surrounded by a confined pocket of highly humid air within said envelope and in contact with said water absorbent material and the leaves and stems of said plant protrude beyond said seams, and, a water reservoir spaced from said root ball and from said chemical packet and located to maintain water in contact with said first matting material and out of free water contact with the dry chemical packet. ### Claim 2 (depends on 1) The system of claim 1 wherein said envelope means comprises a horizontal envelope with a seam at the top. ### Claim 3 (depends on 2) The system of claim 2 wherein said envelope means is confined within an elongated box-like member. ### Claim 4 (depends on 3) The system of claim 3 having means to tilt said envelope means so that water within said envelope will flow to one side. ### Claim 5 (depends on 2) The system of claim 2 having supplemental moist sheets attached to each root ball within said envelopes said supplemental sheets forming extensions of the moisture absorbent envelope lining and providing additional root bearing surfaces for root propagation. ### Claim 6 (depends on 1) The system of claim 1 wherein said envelope means comprises a vertical envelope having slits at each side seam thereof and means for dividing the envelope into a plurality of horizontal compartments with chemical packets in alternate compartments and with plants inserted in alternate compartments with said chemical packets. ### Claim 7 (depends on 6) The system of claim 6 wherein the compartments which contain chemicals have a dry chemical partially surrounded by a water absorbent matting material with a water impervious material extending over the top of said dry packet whereby water dripping down through the envelope means will not come in direct contact with said dry chemical packet but whereby water will be conveyed by said water absorbent material to said packet. ### Claim 8 (depends on 6) The system of claim 6 wherein alternate compartments contain shelves which hold a reservoir of water at each level of the vertical envelope to insure uniform plant growth throughout the vertical height of the envelope.