Used Window Production Machines for sale (81,469)

Condition: new, Year of construction: 2025, functionality: fully functional, total width: 1,000 mm, total length: 1,100 mm, total height: 750 mm, input voltage: 220 V, working width: 600 mm, infeed width: 650 mm, spindle motor power: 1,100 W, warranty duration: 24 months, power: 1.2 kW (1.63 HP), Equipment: CE marking, emergency stop, type plate available, DESTEK MAKİNE is the first and only company to establish a production facility in its field in Türkiye. All machines and hand tools we sell are produced in our own workshops using state-of-the-art CNC machinery from design to final product. With the strength we gain from production, we have been providing products and services to our valued customers in the standing seam roof & facade cladding sector for over 10 years. By conducting a thorough needs analysis with a customer-first approach, we bring all global technological innovations to our country simultaneously. Therefore, our vision can be summarized as: “ Whatever is Manufactured in the World, DESTEK MAKİNE can Produce the Same or Even Better ” With a solution-oriented engineering approach, an experienced team of experts in the field, and a reliable service network, we are here whenever you need us. Our company guarantees 100% customer satisfaction. Our commitment to quality is certified by: Hfedpfjwzzlwex Aacsn CE Conformity Certificate ISO 9001 ISO 14001 ISO 10002 ISO 45001 Every manufactured "DESTEK" standing seam machines goes through delicate tests. "DESTEK" Features - Standard standing seam height 25 mm - There is no problem of oil canning when working with the machine. - Automatic Cutting Guillotine (Standart) - Ribbing Attachments (Standart) - Dijital Counter (Standart) - Cabled Remote Controller (Standart) - Emergency Stop Button (Standart) - Forward and backward button (Standart) - Wrench Sets that will be required during use (Standart) - Weight: 260 kg - You can transport with small cars - You can lift it to the roof easily - You can seperate it to four pieces for carrying easily (Standart) - Material width adjusment (180 mm – 650 mm) (Standart) Please contact us for more information and prices.

Condition: new, Year of construction: 2025, machine/vehicle number: SÇ 211 Alüminyum Pvc Orta Kayıt Alıştırma Makinesi ( Seri Bıçak Değiştirme Sistemli), - Robust mechanical structure capable of processing aluminum profiles with high quality - Medium recording practice of aluminum profiles in -45 / +45 degree angle ranges - Easy blade group change system - Easy angle adjustment with mechanical stops - Adjustable resting system according to four different profiles - Cutting speed adjustment with hydropneumatic system - Knife storage rack (4 pcs.) Hodpfx Aoviq Ryeacefn - Cutter fluid spray system - Max. process diameter : 160 mm - Max. Blade : 200 mm - Min : 90 mm

Condition: new, functionality: fully functional, Year of construction: 2025, 🚧 50-600 T/H Sand & Gravel Production Line – Transforming Raw Materials into High-Quality Aggregates! 🚧 🌟 General Introduction Looking for a reliable and efficient solution for your sand and gravel production needs? Our 50-600 T/H Sand & Gravel Production Line is a high-performance system designed to meet the diverse requirements of construction, infrastructure, and industrial projects. Whether you need coarse aggregates or fine sand, this production line ensures precision, efficiency, and scalability. --- 🏗️ Wide Range of Applications Our sand and gravel production line is perfect for: - Construction Projects: Producing aggregates for concrete, asphalt, and roadbeds. - Mining Operations: Processing various ores and minerals. - Infrastructure Development: Creating high-quality materials for bridges, dams, and highways. - Commercial Sand Supply: Meeting market demand for sand and gravel in bulk. --- 💎 Key Advantages ### 1. High Capacity & Versatility - Produces 50-600 tons per hour, easily scaling to match project demands. - Handles a wide range of raw materials, including limestone, granite, basalt, and river stones. ### 2. Advanced Technology - Incorporates cutting-edge crushing, screening, and washing equipment for consistent quality. - Optimized for energy efficiency, reducing operational costs. ### 3. Customizable Solutions - Configurable to meet your specific requirements, from particle size to layout design. - Offers flexibility in combining different crushers (jaw, cone, impact) and vibrating screens. ### 4. Durable & Low Maintenance - Built with robust materials to withstand heavy-duty operations. - Easy-to-maintain design minimizes downtime and extends equipment lifespan. ### 5. Environmentally Friendly Hfsdpfx Aaeq Nywxecsn - Features dust suppression systems and water recycling units to reduce environmental impact. - Promotes sustainable practices in aggregate production. --- 🚜 Your Complete Solution Our production line includes: - Primary Crushing: Breaks down large rocks into manageable sizes. - Secondary Crushing: Refines materials to desired specifications. - Screening Equipment: Ensures uniform sizing and quality control. - Washing System: Removes impurities for cleaner, higher-grade aggregates.

Condition: like new (used), 8-cavity spoon and knife injection moulds Hfsdpfx Aswq Dwhsacsn

Condition: like new (used), Year of construction: 2019, operating hours: 1 h, functionality: fully functional, machine/vehicle number: 2196028, Gerätetyp: Vollautomat Betriebsart: elektrisch Material: Edelstahl Produktkennzeichnungen: Hersteller-Art.-Nr: VA 4000/AT Gewichtsinfo: Gewicht: 130 kg Hodpfev Acm Tjx Aacefn Geräteanschluss: Anschlusswert: 600 Watt Netzspannung: 400 Volt Schnittstärke maximal: 10 mm Messergröße: 330 mm Länge (Breite): 1270 mm Tiefe: 853 mm Höhe: 1330 mm

Condition: new, Year of construction: 2025, machine/vehicle number: SÇ 211 Alüminyum Pvc Orta Kayıt Alıştırma Makinesi ( 2 Bıçak), - Conforms to CE standards. Hfjdjq U S Ahepfx Aacen - Possibility of lapping the middle register connections of PVC and aluminum profiles. - Up to 30 degrees at different angles, possibility of lapping the middle register connections of profiles - Pneumatic profile clamping system B7ull38nwa - Ability to move the milling motor with a pneumatic cylinder. - Easy series change thanks to the separator button (60-70) OPTION - Hydro check system - Cooling System

Condition: new, Year of construction: 2025, A stone crushing plant for sand and aggregate making is a facility where stones and rocks are crushed into smaller pieces or gravel. It typically includes several stages of crushing and screening to produce various sizes and grades of sand and aggregate materials, which are essential in construction, landscaping, and other applications. Here's an introduction to the components and processes involved in a typical stone crushing plant: ### Components of a Stone Crushing Plant 1. Primary Crusher: - Purpose: The primary crusher, often a jaw crusher or gyratory crusher, initially breaks down large rocks into smaller pieces. - Function: It handles raw materials from the quarry or mine and prepares them for further processing. 2. Secondary Crusher: - Purpose: A secondary crusher, such as a cone crusher or impact crusher, further reduces the size of the crushed stones. - Function: It refines the material after primary crushing, producing smaller and more uniform-sized aggregates. Hjdpfxoq N U Dus Aacsfn 3. Tertiary Crusher (Optional): - Purpose: In some configurations, a tertiary crusher like a vertical shaft impactor (VSI) may be used for shaping and fine crushing. - Function: It produces finely crushed materials for specific applications, such as concrete production or road base. 4. Screening Equipment: - Purpose: Screening equipment like vibrating screens or trommel screens separates the crushed materials into different sizes. - Function: It classifies the aggregates into various grades according to size, ensuring uniformity and meeting specifications. 5. Conveyor Systems: - Purpose: Conveyor belts transport materials between different stages of crushing and screening. - Function: They ensure efficient material handling and continuous operation within the plant. 6. Washing Equipment (Optional): - Purpose: Washing equipment, such as sand washers or scrubbers, may be used to remove impurities from sand and aggregate products. - Function: It improves the quality of the final products by cleaning them and removing fines or contaminants. ### Processes Involved - Primary Crushing: Large rocks are fed into the primary crusher and reduced to a manageable size. - Secondary Crushing: The crushed materials from the primary crusher are further processed by secondary crushers to achieve the desired aggregate sizes. - Screening: The crushed and sized materials are screened to separate them into different sizes and grades. - Material Handling: Conveyor systems transport materials between different stages of the crushing and screening process. Final Product Handling:Finished products, such as sand and various sizes of aggregates, are stored or loaded for transport to customers or construction sites. Applications - Construction: Used in the production of concrete, asphalt, and road base materials. - Landscaping: Provides decorative and functional aggregates for gardens, pathways, and driveways. infrastructure: Essential for building foundations, drainage systems, and structural fill. As for the capacity we have 30 t/h, 30-50 t/h, 50-100 t/h, 100-150 t/h, 150-200 t/h, 200-300 t/h, 300-500 t/h, and both stationary crushing plant and mobile crushing plant are available for option.

Condition: new, Year of construction: 2025, machine/vehicle number: SÇ 211 ALUMİNYUM PVC ÇOKLU ORTA KAYIT ALIŞTIRMA MAKİNESİ, - Notching (milling) process with adjustable linear motor movement - 5 adjustable resting systems for different profiles - Quick blade change feature that makes work easier - Notching of center register profiles between 1/6 pieces - Profiles are fixed in the machine with pneumatic vertical and horizontal clamps - Independent operation of vertical and horizontal clamps - Spare knife storage cabinet on the front of the machine - Notching (milling) of 2.5 meter long profiles by means of support arm - Maximum profile notch height ( h ) 140 mm OPTION - Spray cooling system Hsdpfoq U S Dijx Aacjfn - 220 volt operation

Condition: new, functionality: fully functional, Year of construction: 2025, Aggregate and ballast crusher equipment are used in the crushing and processing of various materials for construction and infrastructure projects. These crushers are designed to break down large rocks, gravel, or stones into smaller pieces, producing aggregates and ballast that are essential components in the construction industry. Here are some key aspects related to aggregate and ballast crusher equipment: 1. Jaw Crusher: - Jaw crushers are commonly used for primary crushing in aggregate and ballast production. They operate by compressing the material between a stationary and a movable jaw. 2. Impact Crusher: - Impact crushers are suitable for shaping and producing fine aggregates. They use impact force to crush the material, making them suitable for various types of rock and ore. 3. Cone Crusher: - Cone crushers are often used for secondary and tertiary crushing in aggregate production. They are efficient for producing well-shaped and finely graded aggregates. 4. Vertical Shaft Impact (VSI) Crusher: - VSI crushers are designed for shaping and producing high-quality artificial sand. They use the "rock-on-rock" crushing principle, where rocks are fed into the rotor to be accelerated and crushed against the stationary anvils. 5. Gyratory Crusher: - Gyratory crushers are primarily used in mining, but they may also be used in the production of aggregates. They have a conical head and a concave surface, which crushes the material between the head and concave. 6. Mobile Crushers: - Mobile crushers, including mobile jaw crushers and mobile impact crushers, provide flexibility and mobility for on-site crushing of aggregates and ballast. They are often used in construction projects where materials need to be processed directly at the job site. Hjdpoq Nxrxjfx Aacofn 7. Screens and Scalpers: - Screens and scalpers are used to separate different sizes of aggregates after the initial crushing stage. Vibrating screens are commonly employed to classify and separate materials based on size. 8. Conveyors: - Conveyors are crucial for transporting materials between various stages of the crushing process and for stockpiling the final products. They enhance efficiency in material handling. 9. Dust Suppression Systems: - Crushing operations can generate dust, and dust suppression systems are used to minimize environmental and health impacts. These systems may include water sprays or chemical suppressants. 10. Quality Control: - Quality control measures, such as particle size analysis and gradation testing, are essential to ensure that the produced aggregates and ballast meet the required specifications and standards. 11. Environmental Considerations: - Crusher equipment should adhere to environmental regulations, and measures like dust control, noise reduction, and proper waste disposal should be implemented. When selecting aggregate and ballast crusher equipment, factors such as the type of material, required product size, production capacity, and mobility requirements should be taken into consideration. Additionally, adherence to safety and environmental standards is crucial in the operation of crushing equipment.

Condition: new, Year of construction: 2025, machine/vehicle number: SÇ 401 Aluminyum Pvc Alttan Çıkma Kesim Makinası, - Complies with CE standards. - Precise cutting at 0 - 180 degrees and intermediate degrees - Quick adjustment buffers for 15, 22.5, 30, 45, 60 and 90 degrees - Table fixing arm for intermediate grades - Saw output speed regulator slows down speed and reduces motor load when cutting aluminum. - Protection cover for safe cutting - Diamond saw diameter 450 millimeters exit distance : 12.5 centimeters - Measuring and transport conveyor is available as standard (2.5 meters right and left) Hjdpfx Ajq U Tcteacefn OPTION - Cooling system and Hydro check system are available for aluminum cutting.

Condition: new, Year of construction: 2025, functionality: fully functional, Ball Mill with Air Classifier: The Ultimate Powder Processing Equipment In the world of industrial powder production, precision, efficiency, and flexibility are paramount. Whether producing ultra-fine powders for high-tech applications or coarser materials for everyday products, the combination of a Ball Mill with Air Classifier offers unparalleled performance. This dynamic duo provides a comprehensive solution for industries ranging from chemicals and ceramics to paints, plastics, and pharmaceuticals. This article introduces the ball mill with an air classifier, explores its applications, and highlights the key advantages of this essential powder equipment. General Introduction to Ball Mill with Air Classifier ball mill with air classifier is an advanced grinding and classification system designed for efficient, high-quality powder production. The system consists of two main components: 1. Ball Mill: A cylindrical grinding device filled with grinding media (such as steel balls) that operates by rotating around its axis. The raw material is reduced to smaller particle sizes through impact and friction within the mill. 2. Air Classifier: A sophisticated device that separates particles based on size using airflow. Fine particles are carried away, while coarser particles are returned to the ball mill for further grinding. The combination of these two components creates a closed-loop system that ensures consistent particle size distribution, high efficiency, and minimal waste. Hfsdpfx Asvlwkxjacjn Applications of Ball Mill with Air Classifier The ball mill with air classifier is a versatile solution used in a wide range of industries to process various materials. Key applications include: 1. Mineral Processing The system is widely used in the production of minerals such as calcium carbonate, quartz, feldspar, and talc. These finely ground minerals are essential for industries like ceramics, paints, plastics, and rubber. 2. Cement and Construction Materials Cement and other construction materials require precise particle size control for optimal performance. The ball mill with air classifier ensures uniformity and enhances the quality of construction materials. 3. Chemicals and Pharmaceuticals Fine powders play a critical role in the chemical and pharmaceutical industries. From active pharmaceutical ingredients (APIs) to industrial chemicals, this system delivers the consistent quality required for these applications. 4. Paints, Coatings, and Pigments The production of paints and coatings demands ultra-fine powders to achieve smooth finishes and vibrant colors. The ball mill with air classifier produces high-quality powders for superior results. #### 5. Food and Agriculture Food-grade powders such as additives, preservatives, and agricultural products like fertilizers can be efficiently processed using this system, meeting stringent regulatory requirements. Industries That Benefit from Ball Mill with Air Classifier Several industries rely on the capabilities of this system to produce fine powders with specific characteristics: - Ceramics: Produces high-purity powders for tiles, insulators, and advanced ceramics. - Rubber and Plastics: Creates fillers and additives for improved durability and performance. - Pharmaceuticals: Ensures consistent particle size for APIs and excipients. -Construction: Delivers materials for concrete, plaster, and other applications.

Condition: ready for operation (used), functionality: fully functional, working width: 6,050 mm, bending angle (max.): 180 °, sheet thickness (max.): 1 mm, overall weight: 6,000 kg, opening width: 250 mm, TECHNICAL DETAILS Max. working width: 6,050 mm Max. sheet thickness: 1.5 mm Max. opening: 250 mm Max. angle: 180° Number of adjustable sequences: 8 MACHINE DETAILS Hfedpsxmgx Rjfx Aacsn Motor power: 4.5 kW Dimensions & Weight Dimensions: 7,300 mm x 1,800 mm x 1,550 mm Weight: 6,000 kg Control: Conventional EQUIPMENT Shear at rear side

Condition: ready for operation (used), Year of construction: 2011, functionality: fully functional, cutting width (max.): 1,300 mm, saw blade diameter: 500 mm, Equipment: scorer, TECHNICAL DETAILS Double roller carriage length: 3,000 mm Cutting width: 1,300 mm Drive power: 5.5 kW Hfjdpfexnx Hcsx Aacen Saw blade diameter: 500 mm Table extension: 840 mm EQUIPMENT 2-axis scoring unit Mitre/fence angle stop

Condition: excellent (used), Collective lot comprising of: Hfedpfx Ajxnc Epeacjn - Fillber Monoblock RVOL.TVP 32-8 OMS Filler/Capping System (With Cap Changeover) With Siemens PLC - Posimat Master-15 bottle Unscrambler, SMF Dumper DRH 310 With Posimat Loading Elevator - SMIPACK XP650 ARX-VS Overlap Shrink Wrapping Machine with FLXMOD Control System - Epackaging Saturno 1T High Speed Labelling System - ASMECH BESPOKE CONVEYOR SYSTEM With Travelator & Bottle Sorting Unit

Year of construction: 2010, condition: used, DFE Meincke is known for its expertise in industrial baking equipment, particularly in the area of biscuit forming machines and ovens. Here are some general details about these products: - Biscuit Forming Machines: - Designed for high-speed production of various types of biscuits. - Capable of producing different shapes and sizes with adjustable settings. - Often equipped with advanced technology to ensure consistent quality and minimal waste. - Can handle various dough types and formulations. - Ovens: - Specifically designed for baking biscuits at optimal temperatures and humidity levels. - Includes different types of ovens, such as convection, rotary, and tunnel ovens. - Feature energy-efficient designs and advanced control systems for better baking performance. - Can be integrated with forming machines for a complete production line. Peerless USA Bakery Mixing Machines: - Usage: Designed for mixing doughs and batters for various baked products such as bread, cakes, cookies, and pastries. - Types: They offer a variety of mixers, including planetary mixers, spiral mixers, and horizontal mixers, catering to different mixing needs. - Features: Common features may include variable speed settings, durable construction, and easy-to-clean designs. Some models might include programmable controls for consistent mixing results. - Applications: Peerless mixers are suitable for commercial bakeries, restaurants, and catering services, helping to improve efficiency and consistency in dough preparation. Line Capacity: 800 kg/h Biscuit Types: Sandwich type biscuit with filling Make: DFE Meincke Model : Turbu 3 Convection Oven Year of manufacture: 2009 Serial Number for Oven : 112988 Hsdexazlxjpfx Aacjfn Voltage: 3 x 380 V Oven Baking surface type: Wire mesh Current Icp: 6KA Current In: 140 A Made in: Denmark Mixer Manufactire: Peerless Year of manufacture of Mixer : 2010 Condition: Excellent Serial Number of Mixer: 209110 Former Manufacture: DFE Meincke Former Year of Manufacture: 2010 Controls: Siemens Type of biscuit: Sandwich type with filling Former Made in: Denmark Construction of Line: Stainless steel Available: Immediately Required Containers: 6-7 40ft

Condition: used, Year of construction: 2004, Ref:10906 . 2004 Herzog + Heymann M7 Multiple Folder. A very versatile folding machine in excellent condition. It is not only a high speed automatic B1 buckle folder for standard section and leaflet work, but also a specialist folder capable of folding maps, multiple roll folding and concertina folding. Comprising; MBO R700 'Perfection Dualfeed' round pile continuous feeder ‘Vacu-Infeed’ for mark free and smooth sheet running ‘Vacu-Alignment’ adjustable vacuum in tape roller infeed of register table Features include:- • MBO MCC Total and batch counter • Stainless steel buckle plates • Sound hoods • Frequency controlled A.C. drive motor & dual action compressor • MBO ASP 66-2 ME Presser/marker delivery unit Hedpow Eu Igjfx Aacofn • Complete with spares, tools & manuals. Folding sequence: 1st buckle unit - 72cm with 16 plates, perforating/scoring shafts Specification: Sheet size, Max: 72 x 104 cm (continuous feeder) Min: 15 x 20 cm Minimum fold length: 4.2 cm Speed range : 40 - 160 m/min.

Condition: excellent (used), Double STDN pancake baking carousel system. Superb system designed for reliable high volume production of pancakes and crepes, blinis etc. Extremely hard to find on the used market. diameters can be adjusted from 30mm to 240mm and weights from 8g to 100g. New cost of this system is in excess of 500,000. We also have a continuous waffle manufacturing line for sale. Hfedpfx Aexlra Rjacjn

Condition: ready for operation (used), functionality: fully functional, Year of construction: 2010, shaft diameter: 100 mm, bending force (max.): 28 t, stroke length: 200 mm, Equipment: CE marking, documentation/manual, TECHNICAL DETAILS Capacity: 90 mm Shaft diameter: 100 mm Usable shaft length: 280 mm Roller speed: 4.6 rpm Bending force: 280 kN Stroke: 200 mm MACHINE DETAILS Hsdoxmgw Topfx Aacofn Control: Conventional Motor power: 12.5 kW Dimensions (L x W x H): 1,600 mm x 1,600 mm x 1,800 mm Weight: 2,800 kg EQUIPMENT CE marking Documentation

Condition: ready for operation (used), chuck outer diameter: 1,600 mm, controller model: E.C.S CNC 2600, Carnaghi Ø 1700 mm CNC Max turningdia -- passage: 1700 mm Max hight of workpiece Z-axis: 1000 mm Turret: yes Qty Tools: 7 Coolant pump: yes Hodpfx Aexl Hxzjacsfn

Condition: used, total height: 1,200 mm, total width: 1,200 mm, total length: 4,000 mm, Empty weight: 4.000 kg - Documentation available: No - Control: Conventional - Transport dimensions: 4000mm x 1200mm x 1200mm (l x w x h) Hjdpswnib Tefx Aacofn - Transport weight [kg]: 4000kg Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: ready for operation (used), total height: 2,200 mm, PANGBORN EUROPE SMERIGLIATRICE-150 CT Type: abrasive band grinding Max sandingwidth: 1300 mm Part thickness: x - 150 mm Hedpfx Ajxl Hx Ujacefn Number of individual abrasifbands: 1 Length L -- R: 3500 mm Depth Fw -- Bw: 2500 mm

Condition: used, Year of construction: 1991, total height: 2,600 mm, total width: 2,450 mm, total length: 3,100 mm, Empty weight: 7.500 kg Price: On request - Year: 1991 - Documentation available: Yes - Control type: Heidenhain - Control: CNC - Motor power: 16.0kW - Transport dimensions: 3100mm x 2450mm x 2600mm (l x w x h) - Transport weight [kg]: 7500kg - Transport packages [pcs.]: 1 Financial information Hfjdpfxexb Rwaj Aacon VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: ready for operation (used), chuck outer diameter: 1,200 mm, controller model: E.C.S CNC 1400, Carnaghi - Ø1400 mm CNC Max turningdia -- passage: 1400 mm Max hight of workpiece Z-axis: 1000 mm Hodsxl Hx Iepfx Aacjfn TOOLING: yes Turret: yes Qty Tools: 7 Coolant pump: yes

Condition: used, Empty weight: 6.000 kg Dimensions (LxBxH): 340 x 210 x 190 cm Price: On request - Max. working width: 860 - Documentation available: No - Transport dimensions: 3400mm x 2100mm x 1900mm (l x w x h) - Transport weight [kg]: 6000kg - Transport packages [pcs.]: 3 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Hfodpfx Aaexbf Iajcon Delivery and trade-in always possible for everything in the industrial sectors Yorick Diebels

Year of construction: 1992, condition: used, Empty weight: 3.800 kg Dimensions (LxBxH): 210 x 260 x 260 cm Price: On request - Digital readout: No - Number of axes: 3 - Travel X [mm]: 610 - Travel Y [mm]: 460 - Travel Z [mm]: 510 - Min. spindle speed [rpm]: 60 - Max. spindle speed [rpm]: 6000 - Interface: BT40 - Table size length [mm]: 950 Hedpfx Aoxb Rwgoacsfn - Table size width [mm]: 560 - Max. workpiece weight [kg]: 500 - Year: 1992 - Documentation available: No - Serial number: 610555 - Control type: Fanuc - Control: CNC - Motor power: 7.5kW - Transport dimensions: 2100mm x 2600mm x 2600mm (l x w x h) - Transport weight [kg]: 3800kg - Transport packages [pcs.]: 1 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum