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Case sealers on this page close and tape the top and the bottom of corrugated cartons in one pass. The category also includes a complete packing line. Case erectors that form the carton and close its bottom are in the Case erectors category.
The five case sealers are FLEX TAPE, TOP TAPE, AUTO-TAPE, RUBBER and AUTO&FOLD-5050. The LINEBOX-03 line erects, carries and seals boxes.
Choose a case sealer by carton size, whether you run one size or mixed sizes, how the top flaps are closed, tape width and if compressed air is needed. A table of the machines is below the product grid.
Showing all 6 results
SKU: 230010
SKU: 280050
SKU: 230022
SKU: 230030
SKU: 230020
SKU: 230034
All five carton sealers tape the top and the bottom of the carton in one pass. Side belts carry the carton through the machine. The FLEX TAPE is a semi-automatic model. The TOP TAPE, AUTO-TAPE, RUBBER and AUTO&FOLD-5050 are automatic. Speeds are 20 m/min for FLEX TAPE and AUTO-TAPE, 19 m/min for TOP TAPE and 16 m/min for AUTO&FOLD-5050. Tape widths are 48–72 mm for FLEX TAPE, TOP TAPE and AUTO-TAPE, and 48–60 mm for RUBBER and AUTO&FOLD-5050.
The AUTO-TAPE and the AUTO&FOLD-5050 adjust to mixed carton sizes by themselves. All models use Kraft or BOPP tape. Each machine is set for a range of carton sizes, as listed in the table below.
The carton enters the machine and is guided by side belts between an upper and a lower tape head. As the carton moves through, each tape head applies tape over the seam and cuts it at the end of the carton.
The FLEX TAPE model is semi-automatic, which means the operator must feed each carton into the machine with the top flaps already closed. In contrast, the TOP TAPE, AUTO-TAPE, RUBBER and AUTO&FOLD-5050 are automatic models that take the carton in from the belts.
TOP TAPE can be connected to an automatic production line. RUBBER and AUTO&FOLD-5050 can run behind a case erector and a conveyor, as the carton feeds itself into the sealer. This is useful if you want to automate both the forming and sealing steps in your packing process.
The number of cartons you can seal in a minute depends on the length of each carton and the gap you leave between them. On the FLEX TAPE, the number of cartons a minute also depends on how quickly the operator feeds them, as each carton is fed in by hand. In a packing line, count the cartons a minute from the belt speed, the carton length and the gap, not from the belt speed alone.
The tape lands on the seam only when the carton runs in the middle of the machine, and the cartons need a gap between them. The manuals for FLEX TAPE, TOP TAPE and AUTO-TAPE all require this. When taping by hand, operators often use different tape lengths or add extra strips, but a sealer puts the same strip on every carton, so the tape used per carton stays the same. FLEX TAPE, TOP TAPE and AUTO-TAPE can be joined to unpowered roller tables before and after them, which serve as infeed and outfeed tables.
The TOP TAPE, RUBBER and AUTO&FOLD-5050 carton sealers fold the top flaps of the carton by themselves. On FLEX TAPE and AUTO-TAPE, the operator closes the top flaps before feeding the carton in.
The flap folder on RUBBER and AUTO&FOLD-5050 works in steps: it folds the front flap, then the rear flap, then the two side flaps. After folding, the machine tapes the top and the bottom in one pass.
A flap folder on a carton sealer closes the top flaps before the carton reaches the tape heads. This means the operator does not need to hold the carton shut while it is taped.
On the RUBBER and AUTO&FOLD-5050 models, the carton is placed on the infeed with the top flaps open and pointing up.
On the RUBBER model, a sensor detects when a carton is present and starts the pneumatic flap folder, which needs compressed air to operate. The folding and taping area is covered by a transparent safety guard with doors. On AUTO&FOLD-5050, the carton length is set with a micro switch that decides when the rear flap is folded, and the folding rods are opened by hand to the width of the cartons, the same on both sides.
On the TOP TAPE, you push the carton onto the side belts with the top flaps open. As the belts carry the carton forward, the machine folds the flaps, and the tape heads then tape the top and the bottom.
Never reach into the flap folder while the machine is running. Always switch off the power and the air before clearing a jammed carton from the folding area. The AUTO&FOLD-5050 manual states this as a safety step.
The table below lists each machine by type, carton size range, tape width and how the top flaps are closed. Use it to compare the case sealers and the complete line.
To use the table, begin by checking the carton size range for each machine. Measure the length, width and height of your smallest and largest cartons and compare them to the figures in the table. Next, look at the tape width column to confirm your tape matches the machine. The last column tells you if the machine closes the flaps for you and whether it is set by hand or adjusts itself to each carton.
The FLEX TAPE and TOP TAPE carton sealers are set by hand to the carton width and height. The RUBBER model uses hand wheels for adjustment. The AUTO-TAPE detects the height and width of each carton and adjusts itself, and the AUTO&FOLD-5050 sets the width and height by itself for every carton using air cylinders. This allows mixed carton sizes to follow one another without resetting the width and height by hand.
When you use a sealer set by hand, such as FLEX TAPE or TOP TAPE, you adjust the machine to the carton width and height before starting a run. This setup is practical for long runs of one carton size, as you only need to set the machine once for the whole batch.
If you need to switch to a different carton size, you must reset the width and height before running the next batch. This means grouping your orders by carton size to avoid frequent stops for adjustment.
The AUTO&FOLD-5050 model sets itself for each carton. Air cylinders move the side belts to the carton width and lower the upper tape head to the carton height for every carton that enters.
Each model covers a specific carton size range. FLEX TAPE handles cartons from 150 mm long and 120–480 mm wide and high. TOP TAPE covers 120–480 mm wide and high. RUBBER handles cartons from W120 × H120 mm to W500 × H500 mm. AUTO&FOLD-5050 covers L200 × W150 × H150 mm to L600 × W500 × H500 mm. AUTO-TAPE handles cartons from 150 mm long and 120–450 mm high. On AUTO&FOLD-5050, keep the cylinder pressure as low as the carton allows, as too much pressure can crush light cartons.
As each carton comes in, air cylinders on the AUTO-TAPE move the upper tape head to match the carton height and the side belts to the carton width, so you can run cartons of random sizes one after another. Two settings on the AUTO-TAPE follow the kind of carton, not its size: the sealing pressure is set to the carton material, and the push of the side arms is set to the carton weight.
To set a hand-adjusted sealer such as the FLEX TAPE or TOP TAPE, place a closed carton of the run in the machine, lower the upper tape head onto its top and turn the width handle until the side belts just touch the carton. On the AUTO&FOLD-5050, only the width and height follow each carton automatically. The folding rods and the length switch are set once for the range of cartons you plan to run, so all sizes in a mixed run must stay within that setting.
The FLEX TAPE, TOP TAPE and AUTO-TAPE use 48–72 mm tape. The RUBBER, AUTO&FOLD-5050 and LINEBOX-03 use 48–60 mm tape. All carton sealing machines in this category accept Kraft (paper) or BOPP (plastic) tape.
The upper and lower tape heads tape the top and the bottom of the carton. On RUBBER, the tape leg on the carton ends can be set from 5 to 50 mm. Check the tape width for each box taper in the table above.
Only one width and thickness can be loaded at a time, so check your tape stock before a run.
The tape leg is the length of tape that runs over the front and rear ends of the carton. On the RUBBER model, the tape leg is set with the blade support for the front leg and a limit block for the rear leg. Thick tape such as Kraft needs more tension on the tape head, which you adjust with the spring. If the tape is too tight or too loose, adjust the spring to correct it. Keep spare rolls at the machine, so a roll change takes a minute and not a search.
When you load a roll of tape on the AUTO&FOLD-5050, its manual asks you to run the tape over the rollers to the tape support with the adhesive side facing out along the whole path. Center the roll on its holder so the tape feeds straight. If the tape runs off the center of the seam, move the tape position on the tape head to correct it. This step is described in the manuals for FLEX TAPE, TOP TAPE and AUTO-TAPE.
The LINEBOX-03 is a complete line that includes the AUTOBOX10 case erector, a motor-driven roller conveyor and the RUBBER carton sealer. The case erectors on their own, FLEX BOX, AUTOBOX and AUTOBOX10, are in the Case erectors category.
The LINEBOX-03 can process up to 720 boxes an hour. It erects, carries and seals boxes automatically. The roller conveyor moves cartons between the machines. The RUBBER model in the line acts as the automatic case sealer.
A case erector forms a carton from a flat blank and closes the bottom, making it ready to fill. After the carton is filled, the carton sealer closes the top and applies tape. For example, in a production area, using a case erector means operators do not need to fold and tape the bottom of each carton by hand.
In the LINEBOX-03, the AUTOBOX10 takes a flat carton from its magazine with suction cups, folds the bottom flaps, tapes the bottom and pushes the carton out at 10–15 cartons a minute. It stores up to 10 carton sizes. The line combines the AUTOBOX10, a motor-driven roller conveyor at 18 m/min and the RUBBER sealer into one line about 6.1 m long. Its working height is 650 mm, and it runs on 220 V single phase with compressed air.
A semi-automatic case sealer like FLEX TAPE suits a packing line where the operator feeds each carton and closes the top flaps by hand. This fits lower output or when cartons come in batches of the same size. The machine is set by hand to one carton width and height, so it suits long runs of identical cartons.
The AUTO-TAPE and the AUTO&FOLD-5050 adjust to the width and height of each carton by themselves, so mixed sizes can follow one another. Models like TOP TAPE and RUBBER fold the top flaps for you, which is useful when you need to automate more of the process.
If you seal only a few cartons an hour and they are mostly the same size, a semi-automatic sealer such as FLEX TAPE is suitable. The operator closes the flaps and feeds each carton into the machine. When you switch to a new carton size, you must set the width and height again.
For a steady flow of the same carton size, an automatic sealer set once by hand, such as TOP TAPE or RUBBER, is practical. You adjust the machine to the carton size at the start of the run and let it process the cartons as they come.
If your packing flow involves mixed carton sizes one after another, as in order picking, the AUTO-TAPE and the AUTO&FOLD-5050 are designed for this use: on the AUTO-TAPE the operator closes the top flaps first, the AUTO&FOLD-5050 folds them itself.
Forming cartons by hand takes time before they can be filled. The LINEBOX-03 line combines erecting, carrying and sealing in one line, from the flat blank to the sealed box; separate case erectors have their own category. To match the machine to your needs, count the cartons you pack in the busiest hour and compare this figure with the speeds given on this page.
If you run long cartons, note that FLEX TAPE and AUTO-TAPE take cartons from 150 mm long with no upper length limit, while the AUTO&FOLD-5050 takes cartons 200–600 mm long. When you use a case erector and a sealer in one line, check every carton size against the ranges of both machines in the table, not only against the erector.
Case sealers work with dry, clean corrugated cartons that are not deformed. Plastic-coated cartons cannot be taped; the RUBBER and AUTO&FOLD-5050 pages say so. Using the right tape is important: Kraft tape is paper, BOPP tape is plastic film. The tape width must match the machine, as listed in the table above.
Problems can come from a dull blade, a dirty rubber roller or a loose tape holder. These can cause a ragged cut or wrinkled tape.
If cartons are stored in a damp place, they can warp and feed badly through the machine. If a carton is bent or crushed, it may not move straight through the belts, causing the tape to miss the seam or jam the machine.
If you see wrinkled tape or tape that runs to one side, check the rubber roller and clean it if needed. Tighten the tape holder or its spring to keep the tape running straight. The tape should lie close to the carton as it is applied.
A ragged cut on the tape usually means the blade is dull or mounted the wrong way round. In this case, turn the blade or replace it with a new one.
If the tape leg is too long or too short, adjust the blade support for the front leg and the limit block for the rear leg. Overfilling a carton can push the flaps open again after the folder, so always fill to the height of the carton.
A wet carton cannot be sealed at all, as the tape will not stick. Dust or dirt on the carton surface also keeps the tape from sticking, and the seal fails. Deformed cartons are a safety risk: torn edges can cut the operator, and they often cause failed seals. A blade set too high scrapes the carton, while a blade set too low does not cut the tape. The AUTO&FOLD-5050 manual gives these limits for the carton, and the manuals for FLEX TAPE, TOP TAPE and AUTO-TAPE give the blade setting.
Tape that does not press down firmly on the carton can come from poor tape or from a front or one-way roller that is seized or faulty. A torn tape end can also come from a weak pull spring, not only from the blade. On the AUTOBOX10 of the LINEBOX-03 line, the belts must just touch the sides of the erected carton: too tight and the carton is deformed, too loose and it is not pushed out. The press plate of the AUTOBOX10 sits about 5 mm above the carton. If it is set too loose, it leaves a gap in the bottom tape. If it is set too tight, the carton does not leave the machine.
The price depends on whether the machine is semi-automatic or automatic, if it folds the top flaps, and if it adjusts to carton size by itself. Adding a case erector or a complete line also affects the price.
The running cost is the tape and, on the machines that need it, compressed air. The price for each case sealer or line is shown on the product card above.
The product cards on the page have a Get offer button for a quote, for example if you want a sealer with a case erector, and an Add to inquiry button that collects several products into one request.
Each carton takes two strips of tape, one on the top and one on the bottom. Each strip is as long as the carton plus the tape legs at both ends. To see how many cartons you can seal with one roll, divide the roll length by the total tape used per carton. For example, you can do this with the 66 m rolls of BOPP tape in the shop.
Wear parts are part of the running cost. These include the blades, rubber rollers and springs on the tape heads, and the drive belts, as listed for FLEX TAPE and AUTO-TAPE. A site without an air supply must add a compressor for every machine here except the FLEX TAPE. Options change what you order: the FLEX TAPE page lists an extension roller table, castors and a stainless-steel version.
TOP TAPE, AUTO-TAPE, RUBBER, AUTO&FOLD-5050 and LINEBOX-03 all list compressed air in their specifications. FLEX TAPE lists only electrical supply. The air unit needs regular care: drain water from the air filter, use only pneumatic oil in the lubricator and wipe dust off the cylinder rods.
Switch off the power and the air before any work on a case sealer, for example before opening the guard or changing the blade. RUBBER and AUTO&FOLD-5050 have a safety guard with doors and an emergency stop; on the RUBBER the guard is transparent.
Plan an air line to the packing place before installing the machine. For example, AUTO&FOLD-5050 takes 6 bar and 100 Nl/min, so check your compressor can supply this.
For power, FLEX TAPE and TOP TAPE run on 110 V or 220 V single phase. AUTO-TAPE, AUTO&FOLD-5050 and the LINEBOX-03 line use 220 V single phase, and RUBBER uses 220–240 V. This means an ordinary single-phase socket is enough for these machines in most packing areas.
On the RUBBER and AUTO&FOLD-5050 the side belts tighten a little over time, which is normal; oil the adjusting screws every three months and keep the machine dry.
Switch off the power and the air before you put a tape roll in or take one out, not only before repairs. This is stated in the AUTO&FOLD-5050 manual. At the first start, let the machine run for a few minutes, turn the width and height handles of the FLEX TAPE or TOP TAPE by hand to check that they move freely, and check that the belts run straight and the tape runs through the heads without catching. These steps are described in the manuals for FLEX TAPE, TOP TAPE and AUTO-TAPE.
Do not wear loose sleeves, ties, rings, bracelets or watches at the machine, as belts and rollers can pull them in. If a hand or a sleeve is caught in a moving part, switch the power off first and only then free it. Dust on the cylinder rods is more than dirt: if it is carried past the seal into the cylinder, it makes the cylinder leak air. On the AUTOBOX10 of the LINEBOX-03 line, if the main air regulator cannot hold its set pressure, the air supply is too weak and the suction pick-up fails. The AUTOBOX10 starts its automatic cycle only after the servo has returned to zero and the cylinders are at their start position, and it stops by itself when the carton counter reaches the set number. Press the Clear button to go on.
Before ordering a case sealer, check your carton sizes: length, width and height, both smallest and largest. Decide if you run one size or mixed sizes, and if the top flaps are closed by hand or by the machine. Confirm the tape type and width you use, and if you have compressed air available. The working height of the case sealer must match your conveyor or packing table.
Count how many cartons you need to seal per hour and check the space and line height in your packing area. After the carton is sealed, the next step may be a strapping machine. The table above shows the figures for each case sealer and the complete line.
Start by listing the length, width and height of your smallest and largest cartons. Compare these figures with the carton size ranges in the table to see which machines fit your needs.
If you pack only one size at a time, a machine set by hand is suitable. If you need to run mixed sizes one after another, look for a model that sets itself for each carton.
Choose the tape type: Kraft or BOPP, and the width, making sure it is within the range of the machine.
Check that you have compressed air and the right power supply at the packing place. Measure the space and the height of the conveyors or tables before and after the machine to make sure everything lines up. Plan what comes after the sealed carton, such as labeling or moving the carton to the pallet.
The working height of the FLEX TAPE is 550–750 mm on its feet and 650–800 mm on the optional castors. TOP TAPE is 550–750 mm and AUTO&FOLD-5050 is 600–850 mm. The legs of the RUBBER adjust the working height within a range of 350 mm. For the AUTOBOX10 in the LINEBOX-03 line, check two sums as well as the three ranges: length plus width up to 900 mm, and half the width plus the height up to 550 mm.
Leave at least 800 mm free on the left and on the right of the FLEX TAPE, TOP TAPE and AUTO-TAPE for the operator and for service. Check the room: FLEX TAPE, TOP TAPE and AUTO-TAPE are specified for 0–40 °C, with humidity up to 90 percent for TOP TAPE or 98 percent for AUTO-TAPE. An unheated dispatch area in winter can fall outside this.
Compressed air is needed for TOP TAPE, AUTO-TAPE, RUBBER, AUTO&FOLD-5050 and LINEBOX-03. FLEX TAPE lists only electrical supply.
The AUTO-TAPE and the AUTO&FOLD-5050 carton sealers adjust to the carton width and height by themselves for every carton. FLEX TAPE and TOP TAPE are set by hand and RUBBER with hand wheels, for runs of cartons of the same size.
The cartons must be dry, clean corrugated cartons that are not deformed. Plastic-coated cartons cannot be taped, as the RUBBER and AUTO&FOLD-5050 pages state.
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