Used Lum Automatic Die Cutting Machine for sale (89,813)

Condition: good (used), Heidelberg Cylinder S 54×72 Automatic Die-Cutting Machine This machine is in production and ready to go. Format: 540x720mm The machine is ready for die-cutting. Lsdpfx Ao Ad Hihjmzeru Fully automatic, central lubrication. Includes mounting frame, cylinder plate, carriages, and a set of fillers and locks.

Condition: good (used), ML-720 Die Cutting Machine This machine is used to cut shapes from a die (die) from materials such as paper, cardboard, leather, plastics, etc. The machine is ready for operation, after a service inspection. Format: 720 x 510 mm Weight: 1800 kg Power supply: 380 V Motor: 2.2 kW Equipment: – Electromagnetic clutch and brake – Quick-mount frame – 3 operating modes: continuous, time-delayed, manual Lrodpfx Amezz Hg Rezeu – Central pressure lubrication – Safety guards – Operating tools and instructions with documentation.

Year of construction: 2024, condition: used, functionality: fully functional, Maximum paper feed size ( mm ): 1320*980mm Minimum paper feed size( mm ): 350x450mm Maximum die cutting size( mm ): 1300x960mm Minimum mouth size( mm ): 8mm Maximum die cutting pressure( T ): 350N/cm² Machinable paper( mm ): 200-2000g/ m² / 10mm (max thickness) Lrsdpfx Amew Rwipozeu Die cutting accuracy( mm ): ±0.1mm Maximum speed(sheets/hour): 5500 sheets/h Maximum stack height of paper feed(mm): 1400mm (above the level) Minimum stack height for receiving paper(mm): 1250mm (above the level) Gross power(KW): 18.5kw Machine weight(T): 19 T Overall dimension: 7500x2200x2250mm

Condition: ready for operation (used), Year of construction: 1995, operating hours: 15,000 h, functionality: fully functional, working width: 1,430 mm, type of input current: three-phase, total width: 5,000 mm, total length: 5,500 mm, total height: 2,100 mm, overall weight: 4,000 kg, input voltage: 380 V, Automatic flatbed die-cutting machine with sheet feeder, suitable for cardboard and corrugated board. The machine is fully operational and ready for production. The machine offers absolute safety for the operator. Lrjdpfx Amezidbnozeu Maximum sheet size: 1030 × 1440 mm.

Condition: excellent (used), Year of construction: 2002, operating hours: 20,000 h, functionality: fully functional, working width: 1,700 mm, type of input current: three-phase, total width: 4,500 mm, total length: 8,030 mm, total height: 2,150 mm, power of the servo motor: 20 W, overall weight: 34,000 kg, input voltage: 380 V, Semi-automatic die-cutting machine. Manual sheet feeding, Lredpfxezidhbj Amzju die-cutting section, waste removal section, and palletizing.

Condition: good (used), Simplacutter model IV 110×160 Cauhe die cutter The machine is fully operational, like new. Made in Spain. Frame size: 1100×1600 mm Sheet size: 1160×1680 mm Weight: 8500 kg Power supply: 380 V Installed power: 7.5 kW Impact force: 350 t Equipment: – pneumatic clutch and brake – control panel – two frames – 2 operating modes: time-delayed, manual – central lubrication Ledpfx Amez Dtb Djzeru – additional safety guards – safety pressure mats – operating tools – hard sheet metal

Year of construction: 2024, condition: new, We are offering this new Machine Wala Enterprise MSA-2 double-die semi-automatic paper plate making machine, manufactured in 2024. Manufacturer: Machine Wala Enterprise Model: MSA-2 Year of Manufacture: 2024 Condition: New Lsdpfx Aoz E Damsmzeru Category ID: 691 Type: Double-die semi-automatic paper plate making machine If you have any questions or require further information, please send us a message or call us.

Condition: good (used), Horizon RD-4055 Rotary Die Cutting Machine The machine is in perfect condition, has low mileage, and is ready to work. Machine setup is via the control panel. Made in Japan. The set consists of: – FFU-4055 sheet feeder – RD-4055 rotary die cutter with double magnetic cylinder (top and bottom) – SPC-4055 separator Manufacturer’s description: – Cost reduction thanks to multiple die reuse, – Machine operation via TOUCH & WORK touchscreen, – Short machine setup time, – Precision and excellent final product quality, – Very easy and quick die assembly on the magnetic cylinder Technical data: – Maximum sheet size before processing: 400 x 550 mm Ledpez R Iq Uefx Amzeru – Minimum sheet size before processing: 200 x 275 mm – Processed material: standard paper, coated paper, and cardboard – Material thickness: 188 to 400 g/m² – Feeder stack height: 500 mm – Production speed: 6,000 cycles per sheet hour Factory set of tools and accessories, instructions.

Condition: good (used), TMZ F-102 76x106cm die cutting machine The machine is fully operational, ready to work. Made in Spain. Format 760x1060mm Lodpozyz D Ijfx Amzsru Weight 3600kg Power supply 380V Installed power 4.5 kW Equipment: – pneumatic clutch – control panel – mounting frame – 3 operating modes: continuous, with time delay, manual – central lubrication – safety guards – operating tools – sheet metal for pressure

Condition: excellent (used), Year of construction: 2012, functionality: fully functional, overall weight: 16,500 kg, total width: 2,185 mm, total length: 5,563 mm, total height: 2,195 mm, Specification: Maximum sheet size: 740 x 1060 mm Minimum sheet size: 330 x 400 mm Maximum cutting force: 300 tons Mechanical speed, up to 8,000 sheets/hour Materials processed: Paper and cardboard: 0.1 - 1.5 mm Corrugated cardboard up to B-flute Equipment: - Steel feeding plate - Lifting suction cups Lrjdpfszt Nbzox Amzeu - Transport suction cups - Adjustment of brush and roller position on the delivery table, using a single knob - Touchscreen monitor mounted on the machine - Pneumatic stops at the front guides - Laser sensors on the front guides - Modification of sensors for transparent materials - Pneumatic closing of the frame and die plate - APC System – Automatic Pressure Control System APC1 - automatic control of cutting pressure, allowing for maintaining the same pressure during the die-cutting/punching process. Possibility to set tonnage tolerance and control the sheet count after a certain number of pieces. - Programmable safety clutch for exceeding cutting force - pneumatic - Stabilizing air blast in the cutting section, increasing precision and cutting speed for thin papers - Quick-change tool system in the stripping section – Punching Metal (upper and lower stripping fingers) - Europing Centering System – die-cutting and stripping zone - Automatic non-stop stacking system, with a curtain and programmable number of sheets per stack - Upper curtain air blast in the stacking zone - Slip sheet inserter with batch counter, located in the stacking zone - Spare gripper carriage – 1 unit - Power transformer Delivery time: immediately after acceptance of the commercial terms and payment of the financial amount. This announcement has been automatically translated. Translation errors are possible.

Year of construction: 1984, condition: excellent (used), functionality: fully functional, Iijima EFC-1600 automatic die-cutting machine with stripping section and front-edge trimming device for bundles, discharge onto conveyor belt. Installed in our workshop and powered on; can be tested. Overall condition is very good. From the second owner, who purchased the machine from DGT in 2001 and used it occasionally for major orders over more than 20 years. The company also had 4 large die-cutters and a Bobst 102. Maximum format 1200 x 1600 mm Corrugated cardboard thickness 2–11 mm Maximum solid board thickness 3 mm Lredpfev Nzpgex Amzsu Normal maximum die-cutting pressure 350 tons Die knife height 30.00 mm Machine's own weight 32,000 kg; this is 12,000 kg heavier than the Bobst 1575 EEG, of which this is the significantly reinforced "copy." The machine is too wide for container loading unless dismantled; however, it can be transported on a flatrack or in a conventional closed truck of standard width (< 250 cm wide).

Condition: used, Year of construction: 2003, functionality: fully functional, machine/vehicle number: CC41011401EJ, working width: 2,000 mm, cutting width (max.): 2,000 mm, cutting height (max.): 70 mm, Investronica CV040/070 automatic multi-ply cutting system, built February 2003 in Madrid. In working order. TECHNICAL DATA Manufacturer: Investronica Sistemas, Madrid (Spain) Model: CV040/070 Identification: LOOCC4.100V000.B0 Serial number: CC41011401EJ Date of manufacture: February 2003 Useful cutting width: 2,000 mm Cutting height: 70 mm compressed fabric Cutting window: 2,200 mm, continuous length with conveyor belt Vacuum system: high-efficiency vacuum generation, integrated module Feed: automatic advance system Lrsdpfxez Atvuj Amzju Sharpening: automatic blade sharpener on the cutting head Blade speed: variable control Table: evacuation table with conveyor belt Approximate weight: 3,000 - 4,000 kg, to be confirmed on dismantling EQUIPMENT INCLUDED 1. Investronica CV040/070 automatic cutting table with cutting head, blade sharpener, integrated vacuum module and evacuation table with conveyor belt. 2. Control station built into the machine, with monitor, keyboard and computer. 3. Investronica P2000 pattern plotter. The machine is installed and running in Seville. It can be seen and tested in operation by appointment. Machine owned by the seller, free of encumbrances.

Year of construction: 1989, operating hours: 55,929 h, condition: used, functionality: fully functional, Manufacturer: BOBST SA, Switzerland Model: AUTOPLATINE SP 142-E Year of Manufacture: 1989 Machine Type: Automatic Die-Cutting Machine Technical Specifications Operating Hours: 55929 h Non Stop sheet inserter Centerline System: Yes Delivery (automatic) Maximum Sheet Size: 1,020 × 1,420 mm Minimum Sheet Size: 500 × 700 mm Maximum Production Speed: 6500 sheets/hour Maximum Die-Cutting Force: 600 tons (6 MN) Lodpfxoz Tzvis Amzoru Suitable Materials Cardboard: 80–2,000 g/m² Corrugated Board: F, E, R, B, FF, FE, FB and EE flute types

Condition: good (used), Year of construction: 2012, saw blade diameter: 250 mm, feed length X-axis: 250 mm, total length: 1,400 mm, total width: 1,200 mm, total height: 2,400 mm, rotational speed (min.): 1,400 rpm, rotational speed (max.): 5,360 rpm, overall weight: 450 kg, Equipment: rotational speed infinitely variable, High precision circular cutting machine for für Aluminium +/- 0,02 mm, full automatic, YOP 2012, blade Ø 250 mm, capacity Ø 3-65 mm, motor 2,5 KW, stroke 250 mm, SIEMENS Simatic HMI, high speed gear 1400 - 5360 rpm, oil/air lubrication, spezial jaws 2-30 mm for single/double clamping, roller conveyor 3 m adjustable, LED lamp, warning light, 10 blades, manual Lrjdpjyyl Hpefx Amzsu

Condition: ready for operation (used), Year of construction: 2018, functionality: fully functional, machine/vehicle number: 001, We offer for sale a custom-built automatic cutting machine AMT Plus PVA, designed for high-volume production of short wooden components from pre-machined timber profiles and square sections. The machine automatically feeds, positions, clamps and cuts workpieces according to preset dimensions, ensuring high productivity and repeatability. Technical Specifications Manufacturer: AMT Plus s.r.o. Model: PVA Year of manufacture: 2018 Workpiece dimensions: Min.: 12 × 40 × 300 mm Max.: 70 × 160 × 800 mm Installed power: 40 kVA Power supply: 400 V / 50 Hz Air pressure: 0.6 MPa Air consumption: approx. 4.5 m³/h Features Servo-controlled positioning system Lredpszyrdljfx Amzeu Frequency-controlled saw drive Pneumatic clamping Multi-blade cutting unit Integrated waste conveyor Fully enclosed safety guarding with dust extraction connections Dimensions Approx. 3500 × 1320 × 2140 mm Condition Fully functional Good technical condition Available for inspection and testing Applications Ideal for the production of: furniture components hardwood blocks flooring elements window and door components other precision-cut wooden parts Sale Terms Available immediately Dismantling and transport to be arranged by the buyer Custom-built machine originally developed for accurate cutting of short wooden components in serial production.

Condition: new, Year of construction: 2026, The RS-9 shredder has been specially designed for effective processing of various types of papers, taking into account the specifications of the punching machine it will cooperate with. Lrjdpfjiklxbsx Amzju The shredder enables the quick and safe shredding of paper directly received from the die-cutting machine for easy transport via a conveyor system to the baler. Our machine is not only easy to operate but also economical to maintain. It features advanced Siemens control that protects against overload. Additionally, the frequency converter ensures smooth start-up and precise motor control. We also design waste disposal systems from multiple punching machines to one shredder, allowing for fast and maintenance-free material packing into a baler. Feel free to contact us.

Condition: new, Year of construction: 2026, functionality: fully functional, machine/vehicle number: SÇ 403 Alüminyum Pvc Kesim Makinası, • Compliant with CE standards. Lrjdpfx Aoramrzomzou • Used for cutting aluminum and PVC profiles. • Hydro-pneumatic cutting process. • Adjustable cutting speed according to the profile. • Capable of cutting at fixed angles: -60, -45, -30, -22.5, -15, 0, +15, +22.5, +30, +45, +60 degrees to the left and right. • Pneumatic vertical and horizontal press. • Ø600 or Ø650 mm diamond-tipped aluminum saw blade. • Equipped with roller conveyor (3 meters right and left). • Oil spray system. • Precision cutting possible thanks to 3 kW motor and Hydro-check. • Can operate with a digital measuring system.

Condition: used, Sawing machine, automatic saw, automatic cutting machine, Adige CM501 – used machine Manufacturer: Adige Model: CM 501 Year: 1996 Lodpfx Aey Ayc Dsmzeru Blade diameter: 250–360 mm Cutting length: 2100 mm Max. workpiece diameter (round): 85 mm Max. workpiece size (square): 70 × 70 mm The ADIGE CM501 automatic circular sawing machine, manufactured in 1996 in Italy, is designed for fully automatic cutting of solid materials, tubes, and profiles made of steel, brass, aluminium, and other light alloys in industrial production environments.

Condition: good (used), Erba Titan Model 3 die cutter Format: 830×1200 The machine is fully operational, ready for production. Titan is synonymous with power, it is the strongest machine in its class. Production Italy Format in frame 830×1200 mm Format of the press 855x1230mm Weight 6900kg Power supply 380V Number of cycles 900-1400/h Installed power 5.5 kW Equipment: – electromagnetic clutch and brake – control panel – 3 operating modes: single, continuous, with time delay on opening – central lubrication – additional safety guards and two pressure safety mats – service tools Lrodpfx Amoz N Sf Tozou – hard sheet metal for the press

Year of construction: 1991, condition: good (used), functionality: fully functional, machine/vehicle number: 8061, Iijima’s excellent high-speed JF-1030, built in 1991, modified for Bobst die-cutting tools. Machine number 8061 Year of manufacture: 1991 Die-cutting head adapted to be compatible with/for Bobst die-cutting punches and retaining strips. More modern LEUZE photoelectric sensors in the front and side guides. LEUZE ultrasonic detection with teach-in function. Sector segment driven by a double set of bevel gears instead of the previous triple system. This results in smoother, vibration-free operation of the gripper carriages. Chains replaced in May 2023. Gripper carriages have been overhauled where necessary, but not replaced. Current tolerance on the front guide for rigid cardboard is < 0.15 mm. Clutch (electric 24 VDC, Warner) replaced in May 2023, as well as all roller bearings on this shaft, including those in the pressure plate just before and after the worm gear. Oil seals replaced. Oil reservoirs flushed and thoroughly cleaned before switching from mineral oil to fully synthetic oil. Absolutely no foam formation, quieter operation. Decommissioned on 23/12/2025; available for sale ex-warehouse Van Rooij from that date. For the end user: can be delivered including installation, transport and warranty. Other specifications according to the factory brochure. Technical Specifications – Flatbed Die-Cutting Machine Materials • Paper from 80 g/m² • Solid fibre board / cardboard up to 2000 g/m² • Corrugated board up to 4 mm, depending on material quality and cutting layout --- Sheet Sizes & Formats • Maximum sheet size: 750 × 1050 mm • Minimum sheet size: 350 × 400 mm • Maximum cutting form size: 745 × 1070 mm • Maximum cutting surface: 730 × 1030 mm • Inside chase dimension: 750 × 1050 mm --- Performance • Maximum cutting pressure: when running max. sheet size 300 metric tons • Maximum speed: up to 8,500 sheets/hour • Gripper margin: adjustable 8 - 12 mm • Normal cutting rule height: 23.80 mm Lodpfx Aex Ndu Domzeru --- Pile Data Feeder pile • Height (incl. pallet): 1,500 mm • Weight (incl. pallet): 1,000 kg Delivery pile • Height (incl. pallet): 1,380 mm • Weight (incl. pallet): 1,000 kg Auxiliary piles • Feeder auxiliary pile height: 450 mm • Feeder auxiliary pile weight: 450 kg • Delivery auxiliary pile height: 800 mm • Delivery auxiliary pile weight: 800 kg --- Machine Dimensions & Weight • Length without feeder: 4,540 mm • Length with feeder: 5,810 mm • Width: 2,350 mm • Height: 2,100 mm • Weight of machine: 15,000 kg • Weight of feeder: 1,000 kg --- Electrical & Air Requirements • Power supply: 3-phase AC • Main motor output: 15 kW • Connected load of machine: 32.4 kVA • Compressed air required: 6 bar • Air intake volume requirement: approx. 30–50 l/min --- Additional Information • Heavy-duty industrial construction • Designed for continuous professional die-cutting production • Specifications subject to alteration

Condition: good (used), Heidelberg Cylinder KSB 40×57 Automatic die-cutter A very rare model on the market. Ljdpez N Sftjfx Amzeru The machine is ready to work, in very good technical condition. After inspection. Suitable for die-cutting. Central lubrication. Format 40×57 cm Weight 3500 kg Power supply 380 V Includes two drawers of additional elements, frame, sheet metal for the cylinder, fillers and typographic locks.

Condition: new, STRUERS Metallographic Cutting Machine Struers Magnutom-5000 XYZR NEW / unused – Year of manufacture 2025 Automatic X-table with rotation and accessories New, unused metallographic cutting machine for the automatic cutting of large material samples. Not assembled or put into operation; stored in shipping condition. Technical data: Manufacturer: Struers Type: Magnutom-5000 XYZR Article number: Year of manufacture: 2025 Design: 4 axes with X-table and rotation Electrical data: Mains connection: 3 × 380–480 V / 50–60 Hz Motor power S1: 11 kW Motor power S3: 16 kW Rated current: 34 A Maximum current: 48 A Maximum load current: 31 A Cutting wheel – manufacturer’s specifications: Maximum diameter: 508 mm (20 inches) Cutting wheel thickness: 3.5 mm Inner hole diameter: 32 mm Speed range: 1,000–2,400 rpm Ledpfxez Tfl Ie Amzsru Cutting capacity according to the manufacturer: Maximum diameter: 190 mm Other cutting ranges: 190 × 254 mm 184 × 400 mm 114 × 618 mm Depending on the workpiece and cutting process Cutting table and axes: Automatic X-table: 524 × 781 mm (W × D, max.) X-axis travel: 370 mm Rotary table: Ø 533 mm T-slots: 12 mm Cutting wheel positioning range Y: 395 mm Cutting wheel positioning range Z: 214 mm Dimensions and weight: Width: 1,758 mm Depth: 1,463 mm Height: 1,882 mm Weight according to nameplate: 2,510 kg Dimensions according to manufacturer’s brochure Cutting chamber – manufacturer’s specifications: Width: 1,000 mm Depth: 1,206 mm Height: 918 mm Equipment and functions: Automatic X-table with rotation Variable cutting wheel speed Direct drive AxioCut and OptiFeed AxioWash – automatic cleaning program Laser for cut positioning Cutting wheel monitoring Programmable cutting sequences and simulation Automatic XYZR movements Areas of application: Metallography, materials testing, sample preparation, Quality assurance, research and industry Scope of delivery according to parts list and original photos: 1 × Struers Magnutom-5000 XYZR – Art.-No. × Coolimat-2000 band filter – Art.-No. × Water level indicator – Art.-No. × COLMF magnetic filter – Art.-No. × Signal lamp – Art.-No. × Collection tray 4,080 × 2,000 × 50 × 3 mm – DE-730200 1 × Service kit Magnutom-5000 – Art.-No. 16582999 Additional accessories according to documented delivery condition. Notes on cooling and commissioning: Coolimat-2000 band filter included according to the parts list. Circulating cooling unit and clamping tools for 12 mm T-slots must be ordered separately according to the sales documentation. Check the scope of the cooling system before commissioning. Condition: NEW / unused, year of manufacture 2025 Not assembled or put into operation Main unit securely packaged for transport Accessories partially in original packaging Original purchase price (net): €140,744.00 Assembly and commissioning are not part of the offer and must be arranged by the buyer. Weight: 3100 kg Shipping by freight forwarder possible upon agreement. Subject to change, errors and prior sale. We will gladly answer any further questions by telephone.

Condition: like new (used), Year of construction: 2023, functionality: fully functional, machine/vehicle number: G90230201, saw blade diameter: 350 mm, total length: 1,500 mm, total width: 970 mm, total height: 1,400 mm, cutting height (max.): 100 mm, overall weight: 350 kg, saw blade speed: 3,000 rpm, input voltage: 400 V, Automatic CNC controlled circular saw for cutting and drilling / tapping aluminium. Tronzadoras MG - GAA-350-90+CNC+TR12 • Automatic cycle. • 700 mm ballscrew feeder. • OMRON controller. • 10 programs with 30 lines. • 20 parts in memory. • Emergency stop. • Adjustable feeding and cutting speeds. • Automatic adjusted cutting length with multiple advances. • Cut to 90º. • Automatic air-oil cooling. • Semi-automatic or fully automatic operation. Lrsdpfx Amsvl Eahezou The machine is inspected, serviced and ready for work.

Condition: good (used), Heidelberg OHT „windmill” Letterpress Machine for die cutting, printing, creasing, perforating numbering, etc. The condition of the machine is very good, after inspection. 100% original, without modifications. This is a machine from the end of production, the distinguishing feature of this version is the exclusive roller paws, a drawer under the machine and a large wheel protection cover, a red knob on the piston lever. Ink system. Full set of accessories and tools. Machine format 26x38cm Weight 600gsm Speed ​​5000 sheets/h Weight 1200kg Power supply 400V Fully complete, two frames, spare elements, documentation included. A very rare machine on the market. Lrjdpfx Ajz N Sfasmzsu

Year of construction: 2019, condition: used, The Lemorau MEBR+ is a digital finishing machine based on a modular concept, allowing modules to be added as needed to meet customer requirements. The MEBR+ operates in both full rotary and semi-rotary modes. The semi-rotary mode is suitable for short runs, while the full rotary mode is ideal for large runs at high speeds. Thanks to state-of-the-art servo technology, the registration tolerance remains consistent during acceleration and braking phases, as well as throughout the production process. The Lemorau MEBR+ is equipped with a servo-controlled compensation system that ensures excellent web tension control when the machine is running in semi-rotary mode. Standard equipment: - Maximum rotary speed 200 m/min (656 ft/min) – label stock - Maximum rotary speed 120 m/min (394 ft/min) – die-cutting for precise fit - Maximum semi-rotary speed 40 m/min (131 ft/min), depending on plate size – die-cutting for precise fit - Web width 250, 330, 400 mm (10, 13, 16 in) - Electronic counter (label/meter/roll counter as well as total meter and label counter) - Adjustable splicing table with pneumatic clamps - Electronic web guiding system with ultrasonic sensor for guiding opaque and transparent materials - Automatic web tension control via servo motors – constant and decreasing tension - Memory for 250 jobs for easy and quick job setup - 6 sets of round knives with lateral adjustment - 2 interchangeable pneumatic unwinders with a diameter of 25, 40 and 76 mm (1, 1.5, 3 in) - Detection of paper and liner tears - Rewinding on label entry/label exit - Remote support via internet connection - Automatic stop at the end of the master roll with programmable roll-end function - Semi-automatic rewinding - Foot pedal for step-by-step machine control - Multilingual touchscreen - Die-cutting repeats 203.20 – 431.80 mm (8 – 17 in) – rotary mode - Die-cutting repeats 41.30–371.00 mm (1.6–14.6 in) – semi-rotary mode - Maximum rewind diameter: 600 mm (23.7 in) with 1 shaft / 350 mm (13.8 in) with 2 shafts - Maximum unwind diameter: 700 mm (27.5 in) - CE conformity certificate Optional equipment: 1 Anti-static bar 1 “Clear-on-Clear” sensor 1 Corona treatment 1 Speed package (80 m/min in semi-rotary mode) 1 Turret unwinder Lrsdpfx Aozqnxtemzju 2 Flexo unit for spot coating with rotating register 1 Web cleaner QRC (Quick Remote Connection) 1 new die-cutting forme with repeat lengths of 41.30–371.00 mm (1.6–14.6 in) – semi-rotary mode approx. 700 die-cutting sheets